21133392 has 40 divisors (see below), whose sum is σ = 62394816. Its totient is φ = 6038016.

The previous prime is 21133381. The next prime is 21133403. The reversal of 21133392 is 29333112.

It is an interprime number because it is at equal distance from previous prime (21133381) and next prime (21133403).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 31113 + ... + 31784.

Almost surely, 2^21133392 is an apocalyptic number.

It is an amenable number.

21133392 is an abundant number, since it is smaller than the sum of its proper divisors (41261424).

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

21133392 is a wasteful number, since it uses less digits than its factorization.

21133392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62915 (or 62909 counting only the distinct ones).

The product of its digits is 972, while the sum is 24.

The square root of 21133392 is about 4597.1069163116. The cubic root of 21133392 is about 276.4753413433.

The spelling of 21133392 in words is "twenty-one million, one hundred thirty-three thousand, three hundred ninety-two".