18789057 has 32 divisors (see below), whose sum is σ = 32198400. Its totient is φ = 10606464.

The previous prime is 18789053. The next prime is 18789059. The reversal of 18789057 is 75098781.

It is not a de Polignac number, because 18789057 - 2² = 18789053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18789053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16263 + ... + 17379.

It is an arithmetic number, because the mean of its divisors is an integer number (1006200).

Almost surely, 2^18789057 is an apocalyptic number.

It is an amenable number.

18789057 is a deficient number, since it is larger than the sum of its proper divisors (13409343).

18789057 is a wasteful number, since it uses less digits than its factorization.

18789057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 18789057 is about 4334.6345866751. The cubic root of 18789057 is about 265.8489777210.

The spelling of 18789057 in words is "eighteen million, seven hundred eighty-nine thousand, fifty-seven".