18942957 has 16 divisors (see below), whose sum is σ = 30615360. Its totient is φ = 11480400.

The previous prime is 18942949. The next prime is 18942967. The reversal of 18942957 is 75924981.

It is not a de Polignac number, because 18942957 - 2³ = 18942949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31594 + ... + 32187.

It is an arithmetic number, because the mean of its divisors is an integer number (1913460).

Almost surely, 2^18942957 is an apocalyptic number.

It is an amenable number.

18942957 is a deficient number, since it is larger than the sum of its proper divisors (11672403).

18942957 is a wasteful number, since it uses less digits than its factorization.

18942957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63801 (or 63795 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 18942957 is about 4352.3507441382. The cubic root of 18942957 is about 266.5728557173.

It can be divided in two parts, 1894 and 2957, that added together give a triangular number (4851 = T₉₈).

The spelling of 18942957 in words is "eighteen million, nine hundred forty-two thousand, nine hundred fifty-seven".