21796504 has 8 divisors (see below), whose sum is σ = 40868460. Its totient is φ = 10898248.

The previous prime is 21796501. The next prime is 21796513. The reversal of 21796504 is 40569712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a pancake number, because a pancake can be divided into 21796504 parts by 6602 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 21796504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796501) 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 as a sum of consecutive naturals, namely, 1362274 + ... + 1362289.

Almost surely, 2^21796504 is an apocalyptic number.

It is an amenable number.

21796504 is a deficient number, since it is larger than the sum of its proper divisors (19071956).

21796504 is a wasteful number, since it uses less digits than its factorization.

21796504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724569 (or 2724565 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 21796504 is about 4668.6726164939. The cubic root of 21796504 is about 279.3373103686.

It can be divided in two parts, 217 and 96504, that added together give a square (96721 = 311²).

The spelling of 21796504 in words is "twenty-one million, seven hundred ninety-six thousand, five hundred four".