21902476 has 12 divisors (see below), whose sum is σ = 38498320. Its totient is φ = 10902960.

The previous prime is 21902471. The next prime is 21902479. The reversal of 21902476 is 67420912.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21902471) 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, 11040 + ... + 12871.

Almost surely, 2^21902476 is an apocalyptic number.

It is an amenable number.

21902476 is a deficient number, since it is larger than the sum of its proper divisors (16595844).

21902476 is a wasteful number, since it uses less digits than its factorization.

21902476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24144 (or 24142 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21902476 is about 4680.0081196511. The cubic root of 21902476 is about 279.7892802338.

The spelling of 21902476 in words is "twenty-one million, nine hundred two thousand, four hundred seventy-six".