21274672726 has 16 divisors (see below), whose sum is σ = 32039224848. Its totient is φ = 10594965600.

The previous prime is 21274672681. The next prime is 21274672753. The reversal of 21274672726 is 62727647212.

It is a super-2 number, since 2×21274672726² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1476316 + ... + 1490656.

It is an arithmetic number, because the mean of its divisors is an integer number (2002451553).

Almost surely, 2^21274672726 is an apocalyptic number.

21274672726 is a deficient number, since it is larger than the sum of its proper divisors (10764552122).

21274672726 is a wasteful number, since it uses less digits than its factorization.

21274672726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17247.

The product of its digits is 790272, while the sum is 46.

The spelling of 21274672726 in words is "twenty-one billion, two hundred seventy-four million, six hundred seventy-two thousand, seven hundred twenty-six".