21883484 has 24 divisors (see below), whose sum is σ = 43868160. Its totient is φ = 9356976.

The previous prime is 21883457. The next prime is 21883559. The reversal of 21883484 is 48438812.

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, 19589 + ... + 20675.

It is an arithmetic number, because the mean of its divisors is an integer number (1827840).

Almost surely, 2^21883484 is an apocalyptic number.

It is an amenable number.

21883484 is an abundant number, since it is smaller than the sum of its proper divisors (21984676).

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

21883484 is a wasteful number, since it uses less digits than its factorization.

21883484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817 (or 1815 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 21883484 is about 4677.9786232945. The cubic root of 21883484 is about 279.7083868737.

The spelling of 21883484 in words is "twenty-one million, eight hundred eighty-three thousand, four hundred eighty-four".