21602765812876 has 12 divisors (see below), whose sum is σ = 37805446233072. Its totient is φ = 10801209746288.

The previous prime is 21602765812867. The next prime is 21602765812919. The reversal of 21602765812876 is 67821856720612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43009135 + ... + 43508518.

It is an arithmetic number, because the mean of its divisors is an integer number (3150453852756).

Almost surely, 2^{21602765812876} is an apocalyptic number.

It is an amenable number.

21602765812876 is a deficient number, since it is larger than the sum of its proper divisors (16202680420196).

21602765812876 is a wasteful number, since it uses less digits than its factorization.

21602765812876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86580080 (or 86580078 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 21602765812876 in words is "twenty-one trillion, six hundred two billion, seven hundred sixty-five million, eight hundred twelve thousand, eight hundred seventy-six".