21274876912 has 20 divisors (see below), whose sum is σ = 42549754816. Its totient is φ = 10294295040.

The previous prime is 21274876877. The next prime is 21274876937. The reversal of 21274876912 is 21967847212.

21274876912 is an admirable number.

It is a congruent number.

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, 21445953 + ... + 21446944.

Almost surely, 2^21274876912 is an apocalyptic number.

It is an amenable number.

21274876912 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21274876912 is a wasteful number, since it uses less digits than its factorization.

21274876912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42892936 (or 42892930 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The spelling of 21274876912 in words is "twenty-one billion, two hundred seventy-four million, eight hundred seventy-six thousand, nine hundred twelve".