18382990 has 8 divisors (see below), whose sum is σ = 33089400. Its totient is φ = 7353192.

The previous prime is 18382979. The next prime is 18382993. The reversal of 18382990 is 9928381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18382993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919140 + ... + 919159.

It is an arithmetic number, because the mean of its divisors is an integer number (4136175).

Almost surely, 2^18382990 is an apocalyptic number.

18382990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18382990 is a deficient number, since it is larger than the sum of its proper divisors (14706410).

18382990 is a wasteful number, since it uses less digits than its factorization.

18382990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838306.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 18382990 is about 4287.5389211061. The cubic root of 18382990 is about 263.9198467261.

The spelling of 18382990 in words is "eighteen million, three hundred eighty-two thousand, nine hundred ninety".