21326492 has 36 divisors (see below), whose sum is σ = 41448120. Its totient is φ = 9593760.

The previous prime is 21326479. The next prime is 21326527. The reversal of 21326492 is 29462312.

It is a super-2 number, since 2×21326492² = 909638522052128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67118 + ... + 67434.

Almost surely, 2^21326492 is an apocalyptic number.

21326492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21326492 is a deficient number, since it is larger than the sum of its proper divisors (20121628).

21326492 is a wasteful number, since it uses less digits than its factorization.

21326492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 469 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 21326492 is about 4618.0614980747. The cubic root of 21326492 is about 277.3148595981.

The spelling of 21326492 in words is "twenty-one million, three hundred twenty-six thousand, four hundred ninety-two".