18864957 has 16 divisors (see below), whose sum is σ = 26216960. Its totient is φ = 12052800.

The previous prime is 18864887. The next prime is 18864959. The reversal of 18864957 is 75946881.

It is not a de Polignac number, because 18864957 - 2¹⁸ = 18602813 is a prime.

It is a super-2 number, since 2×18864957² = 711773205223698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9207 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (1638560).

Almost surely, 2^18864957 is an apocalyptic number.

It is an amenable number.

18864957 is a deficient number, since it is larger than the sum of its proper divisors (7352003).

18864957 is a wasteful number, since it uses less digits than its factorization.

18864957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its digits is 483840, while the sum is 48.

The square root of 18864957 is about 4343.3808260386. The cubic root of 18864957 is about 266.2064699935.

The spelling of 18864957 in words is "eighteen million, eight hundred sixty-four thousand, nine hundred fifty-seven".