21154692 has 24 divisors (see below), whose sum is σ = 53158336. Its totient is φ = 6509088.

The previous prime is 21154673. The next prime is 21154709. The reversal of 21154692 is 29645112.

It is a super-2 number, since 2×21154692² = 895041987229728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67648 + ... + 67959.

Almost surely, 2^21154692 is an apocalyptic number.

It is an amenable number.

21154692 is an abundant number, since it is smaller than the sum of its proper divisors (32003644).

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

21154692 is a wasteful number, since it uses less digits than its factorization.

21154692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135627 (or 135625 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 21154692 is about 4599.4230072912. The cubic root of 21154692 is about 276.5681951459.

The spelling of 21154692 in words is "twenty-one million, one hundred fifty-four thousand, six hundred ninety-two".