21002059488 has 96 divisors (see below), whose sum is σ = 61445744640. Its totient is φ = 6242088960.

The previous prime is 21002059457. The next prime is 21002059489. The reversal of 21002059488 is 88495020012.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002059489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307648 + ... + 369663.

It is an arithmetic number, because the mean of its divisors is an integer number (640059840).

Almost surely, 2^21002059488 is an apocalyptic number.

It is an amenable number.

21002059488 is an abundant number, since it is smaller than the sum of its proper divisors (40443685152).

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

21002059488 is a wasteful number, since it uses less digits than its factorization.

21002059488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677360 (or 677352 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 21002059488 in words is "twenty-one billion, two million, fifty-nine thousand, four hundred eighty-eight".