21459696 has 40 divisors (see below), whose sum is σ = 55603584. Its totient is φ = 7131840.

The previous prime is 21459673. The next prime is 21459701. The reversal of 21459696 is 69695412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30711 + ... + 31401.

Almost surely, 2^21459696 is an apocalyptic number.

It is an amenable number.

21459696 is an abundant number, since it is smaller than the sum of its proper divisors (34143888).

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

21459696 is a wasteful number, since it uses less digits than its factorization.

21459696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1343 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 21459696 is about 4632.4611169442. The cubic root of 21459696 is about 277.8910257286.

It can be divided in two parts, 21459 and 696, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 21459696 in words is "twenty-one million, four hundred fifty-nine thousand, six hundred ninety-six".