21632501133125 has 40 divisors (see below), whose sum is σ = 27470266519608. Its totient is φ = 17027639552000.

The previous prime is 21632501133091. The next prime is 21632501133163. The reversal of 21632501133125 is 52133110523612.

It is a happy number.

It can be written as a sum of positive squares in 20 ways, for example, as 21052148180644 + 580352952481 = 4588262^2 + 761809^2 .

It is not a de Polignac number, because 21632501133125 - 2²⁶ = 21632434024261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8557739 + ... + 10793511.

Almost surely, 2^{21632501133125} is an apocalyptic number.

21632501133125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21632501133125 is a deficient number, since it is larger than the sum of its proper divisors (5837765386483).

21632501133125 is a wasteful number, since it uses less digits than its factorization.

21632501133125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236043 (or 2236028 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 21632501133125 its reverse (52133110523612), we get a palindrome (73765611656737).

The spelling of 21632501133125 in words is "twenty-one trillion, six hundred thirty-two billion, five hundred one million, one hundred thirty-three thousand, one hundred twenty-five".