21337192 has 16 divisors (see below), whose sum is σ = 41747040. Its totient is φ = 10204656.

The previous prime is 21337181. The next prime is 21337213. The reversal of 21337192 is 29173312.

It is a self number, because there is not a number n which added to its sum of digits gives 21337192.

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, 57798 + ... + 58165.

It is an arithmetic number, because the mean of its divisors is an integer number (2609190).

Almost surely, 2^21337192 is an apocalyptic number.

It is an amenable number.

21337192 is a deficient number, since it is larger than the sum of its proper divisors (20409848).

21337192 is a wasteful number, since it uses less digits than its factorization.

21337192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115992 (or 115988 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 21337192 is about 4619.2198475500. The cubic root of 21337192 is about 277.3612302949.

The spelling of 21337192 in words is "twenty-one million, three hundred thirty-seven thousand, one hundred ninety-two".