21662555152 has 40 divisors (see below), whose sum is σ = 50052617856. Its totient is φ = 8880301056.

The previous prime is 21662555147. The next prime is 21662555191. The reversal of 21662555152 is 25155526612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4202113 + ... + 4207264.

Almost surely, 2^21662555152 is an apocalyptic number.

It is an amenable number.

21662555152 is an abundant number, since it is smaller than the sum of its proper divisors (28390062704).

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

21662555152 is a wasteful number, since it uses less digits than its factorization.

21662555152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409415 (or 8409409 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The spelling of 21662555152 in words is "twenty-one billion, six hundred sixty-two million, five hundred fifty-five thousand, one hundred fifty-two".