21876484 has 24 divisors (see below), whose sum is σ = 46327680. Its totient is φ = 8823936.

The previous prime is 21876457. The next prime is 21876511. The reversal of 21876484 is 48467812.

It is an interprime number because it is at equal distance from previous prime (21876457) and next prime (21876511).

It is a congruent number.

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, 22504 + ... + 23455.

It is an arithmetic number, because the mean of its divisors is an integer number (1930320).

Almost surely, 2^21876484 is an apocalyptic number.

It is an amenable number.

21876484 is an abundant number, since it is smaller than the sum of its proper divisors (24451196).

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

21876484 is a wasteful number, since it uses less digits than its factorization.

21876484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45987 (or 45985 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 21876484 is about 4677.2303770501. The cubic root of 21876484 is about 279.6785596988.

The spelling of 21876484 in words is "twenty-one million, eight hundred seventy-six thousand, four hundred eighty-four".