21299042572 has 12 divisors (see below), whose sum is σ = 37275232680. Its totient is φ = 10648976096.

The previous prime is 21299042483. The next prime is 21299042591. The reversal of 21299042572 is 27524099212.

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, 40993 + ... + 210424.

It is an arithmetic number, because the mean of its divisors is an integer number (3106269390).

Almost surely, 2^21299042572 is an apocalyptic number.

It is an amenable number.

21299042572 is a deficient number, since it is larger than the sum of its proper divisors (15976190108).

21299042572 is a wasteful number, since it uses less digits than its factorization.

21299042572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272600 (or 272598 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 21299042572 in words is "twenty-one billion, two hundred ninety-nine million, forty-two thousand, five hundred seventy-two".