21126672696 has 32 divisors (see below), whose sum is σ = 52893158400. Its totient is φ = 7032027360.

The previous prime is 21126672683. The next prime is 21126672709. The reversal of 21126672696 is 69627662112.

It is an interprime number because it is at equal distance from previous prime (21126672683) and next prime (21126672709).

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, 620376 + ... + 653543.

It is an arithmetic number, because the mean of its divisors is an integer number (1652911200).

Almost surely, 2^21126672696 is an apocalyptic number.

It is an amenable number.

21126672696 is an abundant number, since it is smaller than the sum of its proper divisors (31766485704).

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

21126672696 is a wasteful number, since it uses less digits than its factorization.

21126672696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274619 (or 1274615 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The spelling of 21126672696 in words is "twenty-one billion, one hundred twenty-six million, six hundred seventy-two thousand, six hundred ninety-six".