21018528792 has 24 divisors (see below), whose sum is σ = 56925182340. Its totient is φ = 7006176240.

The previous prime is 21018528787. The next prime is 21018528803. The reversal of 21018528792 is 29782581012.

21018528792 is a `hidden beast` number, since 21 + 0 + 18 + 528 + 7 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145961934 + ... + 145962077.

Almost surely, 2^21018528792 is an apocalyptic number.

It is an amenable number.

21018528792 is an abundant number, since it is smaller than the sum of its proper divisors (35906653548).

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

21018528792 is a wasteful number, since it uses less digits than its factorization.

21018528792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291924023 (or 291924016 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 21018528792 in words is "twenty-one billion, eighteen million, five hundred twenty-eight thousand, seven hundred ninety-two".