21431764132 has 12 divisors (see below), whose sum is σ = 37574157040. Its totient is φ = 10696290696.

The previous prime is 21431764129. The next prime is 21431764169. The reversal of 21431764132 is 23146713412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4895382 + ... + 4899757.

Almost surely, 2^21431764132 is an apocalyptic number.

It is an amenable number.

21431764132 is a deficient number, since it is larger than the sum of its proper divisors (16142392908).

21431764132 is a wasteful number, since it uses less digits than its factorization.

21431764132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795690 (or 9795688 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The spelling of 21431764132 in words is "twenty-one billion, four hundred thirty-one million, seven hundred sixty-four thousand, one hundred thirty-two".