Search a number
-
+
18002997 = 3223292999
BaseRepresentation
bin100010010101…
…1010000110101
31020212122110200
41010223100311
514102043442
61441511113
7306010605
oct104532065
936778420
1018002997
11a186a11
126042499
13396447c
142568c05
1518a934c
hex112b435

18002997 has 24 divisors (see below), whose sum is σ = 28080000. Its totient is φ = 11080608.

The previous prime is 18002993. The next prime is 18003001. The reversal of 18002997 is 79920081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18002993) and next prime (18003001).

It is not a de Polignac number, because 18002997 - 22 = 18002993 is a prime.

18002997 is a modest number, since divided by 2997 gives 18 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18002993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4504 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (1170000).

It is a vampire number, since it can be written as 20018997 (with its own digits).

Almost surely, 218002997 is an apocalyptic number.

It is an amenable number.

18002997 is a deficient number, since it is larger than the sum of its proper divisors (10077003).

18002997 is a wasteful number, since it uses less digits than its factorization.

18002997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 18002997 is about 4242.9938722558. The cubic root of 18002997 is about 262.0886837284.

The spelling of 18002997 in words is "eighteen million, two thousand, nine hundred ninety-seven".

Divisors: 1 3 9 23 29 69 87 207 261 667 2001 2999 6003 8997 26991 68977 86971 206931 260913 620793 782739 2000333 6000999 18002997