21238416876 has 12 divisors (see below), whose sum is σ = 49556306072. Its totient is φ = 7079472288.

The previous prime is 21238416869. The next prime is 21238416893. The reversal of 21238416876 is 67861483212.

It is a tau number, because it is divible by the number of its divisors (12).

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, 884934025 + ... + 884934048.

Almost surely, 2^21238416876 is an apocalyptic number.

It is an amenable number.

21238416876 is an abundant number, since it is smaller than the sum of its proper divisors (28317889196).

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

21238416876 is a wasteful number, since it uses less digits than its factorization.

21238416876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769868080 (or 1769868078 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The spelling of 21238416876 in words is "twenty-one billion, two hundred thirty-eight million, four hundred sixteen thousand, eight hundred seventy-six".