21192592 has 20 divisors (see below), whose sum is σ = 42386176. Its totient is φ = 10254240.

The previous prime is 21192583. The next prime is 21192599. The reversal of 21192592 is 29529112.

21192592 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20868 + ... + 21859.

Almost surely, 2^21192592 is an apocalyptic number.

It is an amenable number.

21192592 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21192592 is a wasteful number, since it uses less digits than its factorization.

21192592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42766 (or 42760 counting only the distinct ones).

The product of its digits is 3240, while the sum is 31.

The square root of 21192592 is about 4603.5412456065. The cubic root of 21192592 is about 276.7332598847.

The spelling of 21192592 in words is "twenty-one million, one hundred ninety-two thousand, five hundred ninety-two".