21072184292 has 12 divisors (see below), whose sum is σ = 37051093296. Its totient is φ = 10486157640.

The previous prime is 21072184277. The next prime is 21072184303. The reversal of 21072184292 is 29248127012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12482678 + ... + 12484365.

It is an arithmetic number, because the mean of its divisors is an integer number (3087591108).

Almost surely, 2^21072184292 is an apocalyptic number.

It is an amenable number.

21072184292 is a deficient number, since it is larger than the sum of its proper divisors (15978909004).

21072184292 is a wasteful number, since it uses less digits than its factorization.

21072184292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24967258 (or 24967256 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 21072184292 in words is "twenty-one billion, seventy-two million, one hundred eighty-four thousand, two hundred ninety-two".