21170520662 has 16 divisors (see below), whose sum is σ = 32231086272. Its totient is φ = 10427561160.

The previous prime is 21170520653. The next prime is 21170520671. The reversal of 21170520662 is 26602507112.

It is an interprime number because it is at equal distance from previous prime (21170520653) and next prime (21170520671).

It is a congruent number.

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, 126164 + ... + 241367.

It is an arithmetic number, because the mean of its divisors is an integer number (2014442892).

Almost surely, 2^21170520662 is an apocalyptic number.

21170520662 is a deficient number, since it is larger than the sum of its proper divisors (11060565610).

21170520662 is a wasteful number, since it uses less digits than its factorization.

21170520662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367963.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21170520662 in words is "twenty-one billion, one hundred seventy million, five hundred twenty thousand, six hundred sixty-two".