21723632712 has 48 divisors (see below), whose sum is σ = 58842051840. Its totient is φ = 7240323168.

The previous prime is 21723632683. The next prime is 21723632713.

21723632712 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 3 + 632 + 7 + 12 = 666.

21723632712 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21723632713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861873 + ... + 886719.

It is an arithmetic number, because the mean of its divisors is an integer number (1225876080).

Almost surely, 2^21723632712 is an apocalyptic number.

It is an amenable number.

21723632712 is an abundant number, since it is smaller than the sum of its proper divisors (37118419128).

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

21723632712 is a wasteful number, since it uses less digits than its factorization.

21723632712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37002 (or 36995 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The spelling of 21723632712 in words is "twenty-one billion, seven hundred twenty-three million, six hundred thirty-two thousand, seven hundred twelve".