18457957 has 12 divisors (see below), whose sum is σ = 21612576. Its totient is φ = 15717240.

The previous prime is 18457883. The next prime is 18457969. The reversal of 18457957 is 75975481.

It is a happy number.

It is not a de Polignac number, because 18457957 - 2¹¹ = 18455909 is a prime.

It is a super-2 number, since 2×18457957² = 681392353227698, 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 (18457157) 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, 6832 + ... + 9142.

It is an arithmetic number, because the mean of its divisors is an integer number (1801048).

Almost surely, 2^18457957 is an apocalyptic number.

It is an amenable number.

18457957 is a deficient number, since it is larger than the sum of its proper divisors (3154619).

18457957 is a wasteful number, since it uses less digits than its factorization.

18457957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488 (or 2481 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The square root of 18457957 is about 4296.2724541165. The cubic root of 18457957 is about 264.2781207739.

The spelling of 18457957 in words is "eighteen million, four hundred fifty-seven thousand, nine hundred fifty-seven".