21716484 has 48 divisors (see below), whose sum is σ = 52987200. Its totient is φ = 6915456.

The previous prime is 21716479. The next prime is 21716489. The reversal of 21716484 is 48461712.

It is an interprime number because it is at equal distance from previous prime (21716479) and next prime (21716489).

It is not an unprimeable number, because it can be changed into a prime (21716489) 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 15 ways as a sum of consecutive naturals, for example, 25782 + ... + 26610.

It is an arithmetic number, because the mean of its divisors is an integer number (1103900).

Almost surely, 2^21716484 is an apocalyptic number.

It is an amenable number.

21716484 is an abundant number, since it is smaller than the sum of its proper divisors (31270716).

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

21716484 is a wasteful number, since it uses less digits than its factorization.

21716484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 21716484 is about 4660.0948488201. The cubic root of 21716484 is about 278.9950539327.

The spelling of 21716484 in words is "twenty-one million, seven hundred sixteen thousand, four hundred eighty-four".