21552001504 has 48 divisors (see below), whose sum is σ = 46317806640. Its totient is φ = 9790018560.

The previous prime is 21552001487. The next prime is 21552001519. The reversal of 21552001504 is 40510025512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547342 + ... + 585394.

It is an arithmetic number, because the mean of its divisors is an integer number (964954305).

Almost surely, 2^21552001504 is an apocalyptic number.

It is an amenable number.

21552001504 is an abundant number, since it is smaller than the sum of its proper divisors (24765805136).

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

21552001504 is a wasteful number, since it uses less digits than its factorization.

21552001504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39683 (or 39675 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 21552001504 in words is "twenty-one billion, five hundred fifty-two million, one thousand, five hundred four".