21739296 has 24 divisors (see below), whose sum is σ = 57065904. Its totient is φ = 7246400.

The previous prime is 21739261. The next prime is 21739303. The reversal of 21739296 is 69293712.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113130 + ... + 113321.

It is an arithmetic number, because the mean of its divisors is an integer number (2377746).

Almost surely, 2^21739296 is an apocalyptic number.

It is an amenable number.

21739296 is an abundant number, since it is smaller than the sum of its proper divisors (35326608).

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

21739296 is a wasteful number, since it uses less digits than its factorization.

21739296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226464 (or 226456 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 21739296 is about 4662.5417960593. The cubic root of 21739296 is about 279.0927095196.

The spelling of 21739296 in words is "twenty-one million, seven hundred thirty-nine thousand, two hundred ninety-six".