21982932 has 36 divisors (see below), whose sum is σ = 55741140. Its totient is φ = 7304832.

The previous prime is 21982931. The next prime is 21982951. The reversal of 21982932 is 23928912.

It can be written as a sum of positive squares in 2 ways, for example, as 19660356 + 2322576 = 4434^2 + 1524^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21982931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13978 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (1548365).

Almost surely, 2^21982932 is an apocalyptic number.

It is an amenable number.

21982932 is an abundant number, since it is smaller than the sum of its proper divisors (33758208).

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

21982932 is a wasteful number, since it uses less digits than its factorization.

21982932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1907 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 21982932 is about 4688.5959518815. The cubic root of 21982932 is about 280.1314518829.

The spelling of 21982932 in words is "twenty-one million, nine hundred eighty-two thousand, nine hundred thirty-two".