21982376 has 16 divisors (see below), whose sum is σ = 44387700. Its totient is φ = 10145664.

The previous prime is 21982361. The next prime is 21982391. The reversal of 21982376 is 67328912.

It is an interprime number because it is at equal distance from previous prime (21982361) and next prime (21982391).

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 1060900 = 4574^2 + 1030^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105581 + ... + 105788.

Almost surely, 2^21982376 is an apocalyptic number.

21982376 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21982376 is an abundant number, since it is smaller than the sum of its proper divisors (22405324).

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

21982376 is a wasteful number, since it uses less digits than its factorization.

21982376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211388 (or 211384 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 21982376 is about 4688.5366587028. The cubic root of 21982376 is about 280.1290901355.

The spelling of 21982376 in words is "twenty-one million, nine hundred eighty-two thousand, three hundred seventy-six".