21296464 has 20 divisors (see below), whose sum is σ = 47156704. Its totient is φ = 9127008.

The previous prime is 21296453. The next prime is 21296467. The reversal of 21296464 is 46469212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94962 + ... + 95185.

Almost surely, 2^21296464 is an apocalyptic number.

It is an amenable number.

21296464 is an abundant number, since it is smaller than the sum of its proper divisors (25860240).

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

21296464 is a wasteful number, since it uses less digits than its factorization.

21296464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190162 (or 190156 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 21296464 is about 4614.8092051568. The cubic root of 21296464 is about 277.1846440592.

The spelling of 21296464 in words is "twenty-one million, two hundred ninety-six thousand, four hundred sixty-four".