21357699966696 has 32 divisors (see below), whose sum is σ = 53407295422560. Its totient is φ = 7117493921472.

The previous prime is 21357699966683. The next prime is 21357699966751. The reversal of 21357699966696 is 69666999675312.

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, 108612270 + ... + 108808733.

It is an arithmetic number, because the mean of its divisors is an integer number (1668977981955).

Almost surely, 2^{21357699966696} is an apocalyptic number.

It is an amenable number.

21357699966696 is an abundant number, since it is smaller than the sum of its proper divisors (32049595455864).

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

21357699966696 is a wasteful number, since it uses less digits than its factorization.

21357699966696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217425105 (or 217425101 counting only the distinct ones).

The product of its digits is 10713850560, while the sum is 84.

The spelling of 21357699966696 in words is "twenty-one trillion, three hundred fifty-seven billion, six hundred ninety-nine million, nine hundred sixty-six thousand, six hundred ninety-six".