21733384 has 32 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 10561600.

The previous prime is 21733381. The next prime is 21733391. The reversal of 21733384 is 48333712.

It is not an unprimeable number, because it can be changed into a prime (21733381) 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, 46914 + ... + 47374.

It is an arithmetic number, because the mean of its divisors is an integer number (1309770).

Almost surely, 2^21733384 is an apocalyptic number.

It is an amenable number.

21733384 is a deficient number, since it is larger than the sum of its proper divisors (20179256).

21733384 is a wasteful number, since it uses less digits than its factorization.

21733384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 617 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 21733384 is about 4661.9077639953. The cubic root of 21733384 is about 279.0674074783.

The spelling of 21733384 in words is "twenty-one million, seven hundred thirty-three thousand, three hundred eighty-four".