21526412612 has 12 divisors (see below), whose sum is σ = 37672724880. Its totient is φ = 10762776936.

The previous prime is 21526412599. The next prime is 21526412623. The reversal of 21526412612 is 21621462512.

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, 23063 + ... + 208769.

It is an arithmetic number, because the mean of its divisors is an integer number (3139393740).

Almost surely, 2^21526412612 is an apocalyptic number.

It is an amenable number.

21526412612 is a deficient number, since it is larger than the sum of its proper divisors (16146312268).

21526412612 is a wasteful number, since it uses less digits than its factorization.

21526412612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214690 (or 214688 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The spelling of 21526412612 in words is "twenty-one billion, five hundred twenty-six million, four hundred twelve thousand, six hundred twelve".