21492152 has 32 divisors (see below), whose sum is σ = 44167680. Its totient is φ = 9723360.

The previous prime is 21492151. The next prime is 21492157. The reversal of 21492152 is 25129412.

It is a super-2 number, since 2×21492152² = 923825195182208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24473 + ... + 25335.

It is an arithmetic number, because the mean of its divisors is an integer number (1380240).

Almost surely, 2^21492152 is an apocalyptic number.

21492152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21492152 is an abundant number, since it is smaller than the sum of its proper divisors (22675528).

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

21492152 is a wasteful number, since it uses less digits than its factorization.

21492152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1159 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 21492152 is about 4635.9628989024. The cubic root of 21492152 is about 278.0310508249.

The spelling of 21492152 in words is "twenty-one million, four hundred ninety-two thousand, one hundred fifty-two".