21274343512 has 16 divisors (see below), whose sum is σ = 39911868360. Its totient is φ = 10631178624.

The previous prime is 21274343449. The next prime is 21274343527. The reversal of 21274343512 is 21534347212.

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, 734038 + ... + 762469.

Almost surely, 2^21274343512 is an apocalyptic number.

It is an amenable number.

21274343512 is a deficient number, since it is larger than the sum of its proper divisors (18637524848).

21274343512 is a wasteful number, since it uses less digits than its factorization.

21274343512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498290 (or 1498286 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The spelling of 21274343512 in words is "twenty-one billion, two hundred seventy-four million, three hundred forty-three thousand, five hundred twelve".