21392592 has 40 divisors (see below), whose sum is σ = 59517024. Its totient is φ = 6582144.

The previous prime is 21392587. The next prime is 21392593. The reversal of 21392592 is 29529312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21392593) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16518 + ... + 17765.

Almost surely, 2^21392592 is an apocalyptic number.

It is an amenable number.

21392592 is an abundant number, since it is smaller than the sum of its proper divisors (38124432).

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

21392592 is a wasteful number, since it uses less digits than its factorization.

21392592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34307 (or 34301 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 21392592 is about 4625.2126437603. The cubic root of 21392592 is about 277.6010702370.

The spelling of 21392592 in words is "twenty-one million, three hundred ninety-two thousand, five hundred ninety-two".