18705562428 has 36 divisors (see below), whose sum is σ = 50772242472. Its totient is φ = 5344446240.

The previous prime is 18705562427. The next prime is 18705562457. The reversal of 18705562428 is 82426550781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18705562427) 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, 15905503 + ... + 15906678.

Almost surely, 2^18705562428 is an apocalyptic number.

It is an amenable number.

18705562428 is an abundant number, since it is smaller than the sum of its proper divisors (32066680044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18705562428 is a wasteful number, since it uses less digits than its factorization.

18705562428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31812202 (or 31812193 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 18705562428 in words is "eighteen billion, seven hundred five million, five hundred sixty-two thousand, four hundred twenty-eight".