21513296 has 40 divisors (see below), whose sum is σ = 50443200. Its totient is φ = 8676864.

The previous prime is 21513277. The next prime is 21513299. The reversal of 21513296 is 69231512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3746 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (1261080).

Almost surely, 2^21513296 is an apocalyptic number.

It is an amenable number.

21513296 is an abundant number, since it is smaller than the sum of its proper divisors (28929904).

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

21513296 is a wasteful number, since it uses less digits than its factorization.

21513296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331 (or 11325 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 21513296 is about 4638.2427707053. The cubic root of 21513296 is about 278.1221966809.

The spelling of 21513296 in words is "twenty-one million, five hundred thirteen thousand, two hundred ninety-six".