21632425715440 has 40 divisors (see below), whose sum is σ = 53253942132240. Its totient is φ = 8143972033536.

The previous prime is 21632425715419. The next prime is 21632425715479. The reversal of 21632425715440 is 4451752423612.

It is a tau number, because it is divible by the number of its divisors (40).

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, 7953096330 + ... + 7953099049.

It is an arithmetic number, because the mean of its divisors is an integer number (1331348553306).

Almost surely, 2^{21632425715440} is an apocalyptic number.

21632425715440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21632425715440 is an abundant number, since it is smaller than the sum of its proper divisors (31621516416800).

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

21632425715440 is a wasteful number, since it uses less digits than its factorization.

21632425715440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15906195409 (or 15906195403 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 21632425715440 in words is "twenty-one trillion, six hundred thirty-two billion, four hundred twenty-five million, seven hundred fifteen thousand, four hundred forty".