18888957 has 20 divisors (see below), whose sum is σ = 29446560. Its totient is φ = 12043944.

The previous prime is 18888949. The next prime is 18888959. The reversal of 18888957 is 75988881.

It is not a de Polignac number, because 18888957 - 2³ = 18888949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18888959) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3207 + ... + 6932.

It is an arithmetic number, because the mean of its divisors is an integer number (1472328).

Almost surely, 2^18888957 is an apocalyptic number.

It is an amenable number.

18888957 is a deficient number, since it is larger than the sum of its proper divisors (10557603).

18888957 is a wasteful number, since it uses less digits than its factorization.

18888957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10174 (or 10165 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 18888957 is about 4346.1427726203. The cubic root of 18888957 is about 266.3193114531.

The spelling of 18888957 in words is "eighteen million, eight hundred eighty-eight thousand, nine hundred fifty-seven".