21013296 has 40 divisors (see below), whose sum is σ = 54495024. Its totient is φ = 6977280.

The previous prime is 21013273. The next prime is 21013301. The reversal of 21013296 is 69231012.

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

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, 14526 + ... + 15906.

Almost surely, 2^21013296 is an apocalyptic number.

It is an amenable number.

21013296 is an abundant number, since it is smaller than the sum of its proper divisors (33481728).

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

21013296 is a wasteful number, since it uses less digits than its factorization.

21013296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 21013296 is about 4584.0261779357. The cubic root of 21013296 is about 275.9506317917.

The spelling of 21013296 in words is "twenty-one million, thirteen thousand, two hundred ninety-six".