21372650632 has 8 divisors (see below), whose sum is σ = 40073719950. Its totient is φ = 10686325312.

The previous prime is 21372650603. The next prime is 21372650671. The reversal of 21372650632 is 23605627312.

It can be written as a sum of positive squares in only one way, i.e., 20054524996 + 1318125636 = 141614^2 + 36306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21372650591 and 21372650600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335790657 + ... + 1335790672.

Almost surely, 2^21372650632 is an apocalyptic number.

It is an amenable number.

21372650632 is a deficient number, since it is larger than the sum of its proper divisors (18701069318).

21372650632 is a wasteful number, since it uses less digits than its factorization.

21372650632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671581335 (or 2671581331 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 21372650632 in words is "twenty-one billion, three hundred seventy-two million, six hundred fifty thousand, six hundred thirty-two".