21039296 has 28 divisors (see below), whose sum is σ = 43568112. Its totient is φ = 10061568.

The previous prime is 21039287. The next prime is 21039307. The reversal of 21039296 is 69293012.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 5675 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (1556004).

Almost surely, 2^21039296 is an apocalyptic number.

It is an amenable number.

21039296 is an abundant number, since it is smaller than the sum of its proper divisors (22528816).

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

21039296 is a wasteful number, since it uses less digits than its factorization.

21039296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14328 (or 14318 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 21039296 is about 4586.8612361832. The cubic root of 21039296 is about 276.0643972118.

The spelling of 21039296 in words is "twenty-one million, thirty-nine thousand, two hundred ninety-six".