21064124332 has 6 divisors (see below), whose sum is σ = 36862217588. Its totient is φ = 10532062164.

The previous prime is 21064124321. The next prime is 21064124359. The reversal of 21064124332 is 23342146012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21064124332.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2633015538 + ... + 2633015545.

Almost surely, 2^21064124332 is an apocalyptic number.

It is an amenable number.

21064124332 is a deficient number, since it is larger than the sum of its proper divisors (15798093256).

21064124332 is a wasteful number, since it uses less digits than its factorization.

21064124332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266031087 (or 5266031085 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 21064124332 in words is "twenty-one billion, sixty-four million, one hundred twenty-four thousand, three hundred thirty-two".