21470663426572 has 24 divisors (see below), whose sum is σ = 39556400710400. Its totient is φ = 10168982612496.

The previous prime is 21470663426539. The next prime is 21470663426587. The reversal of 21470663426572 is 27562436607412.

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, 17910648 + ... + 19071775.

Almost surely, 2^{21470663426572} is an apocalyptic number.

It is an amenable number.

21470663426572 is a deficient number, since it is larger than the sum of its proper divisors (18085737283828).

21470663426572 is a wasteful number, since it uses less digits than its factorization.

21470663426572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36990085 (or 36990083 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 21470663426572 in words is "twenty-one trillion, four hundred seventy billion, six hundred sixty-three million, four hundred twenty-six thousand, five hundred seventy-two".