18259019 has 12 divisors (see below), whose sum is σ = 19805904. Its totient is φ = 16818192.

The previous prime is 18259013. The next prime is 18259039. The reversal of 18259019 is 91095281.

It is a de Polignac number, because none of the positive numbers 2^k-18259019 is a prime.

It is a super-2 number, since 2×18259019² = 666783549684722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18259019.

It is not an unprimeable number, because it can be changed into a prime (18259013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12674 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (1650492).

Almost surely, 2^18259019 is an apocalyptic number.

18259019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18259019 is a deficient number, since it is larger than the sum of its proper divisors (1546885).

18259019 is a wasteful number, since it uses less digits than its factorization.

18259019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 18259019 is about 4273.0573363811. The cubic root of 18259019 is about 263.3252348450.

The spelling of 18259019 in words is "eighteen million, two hundred fifty-nine thousand, nineteen".