21725955376 has 20 divisors (see below), whose sum is σ = 42129537912. Its totient is φ = 10853816576.

The previous prime is 21725955373. The next prime is 21725955379. The reversal of 21725955376 is 67355952712.

It is an interprime number because it is at equal distance from previous prime (21725955373) and next prime (21725955379).

It is not an unprimeable number, because it can be changed into a prime (21725955373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552985 + ... + 590968.

Almost surely, 2^21725955376 is an apocalyptic number.

It is an amenable number.

21725955376 is a deficient number, since it is larger than the sum of its proper divisors (20403582536).

21725955376 is a wasteful number, since it uses less digits than its factorization.

21725955376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145148 (or 1145142 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 52.

The spelling of 21725955376 in words is "twenty-one billion, seven hundred twenty-five million, nine hundred fifty-five thousand, three hundred seventy-six".