21632525214 has 32 divisors (see below), whose sum is σ = 44674575360. Its totient is φ = 6976065600.

The previous prime is 21632525197. The next prime is 21632525219. The reversal of 21632525214 is 41252523612.

It is a happy number.

It is a super-2 number, since 2×21632525214² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632525219) 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, 647922 + ... + 680490.

It is an arithmetic number, because the mean of its divisors is an integer number (1396080480).

Almost surely, 2^21632525214 is an apocalyptic number.

21632525214 is an abundant number, since it is smaller than the sum of its proper divisors (23042050146).

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

21632525214 is a wasteful number, since it uses less digits than its factorization.

21632525214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36176.

The product of its digits is 28800, while the sum is 33.

The spelling of 21632525214 in words is "twenty-one billion, six hundred thirty-two million, five hundred twenty-five thousand, two hundred fourteen".