21492592 has 20 divisors (see below), whose sum is σ = 45427896. Its totient is φ = 9769280.

The previous prime is 21492589. The next prime is 21492593. The reversal of 21492592 is 29529412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492593) 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, 60883 + ... + 61234.

Almost surely, 2^21492592 is an apocalyptic number.

21492592 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21492592 is an abundant number, since it is smaller than the sum of its proper divisors (23935304).

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

21492592 is a wasteful number, since it uses less digits than its factorization.

21492592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122136 (or 122130 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 21492592 is about 4636.0103537417. The cubic root of 21492592 is about 278.0329481505.

The spelling of 21492592 in words is "twenty-one million, four hundred ninety-two thousand, five hundred ninety-two".