21883432 has 16 divisors (see below), whose sum is σ = 41158260. Its totient is φ = 10907904.

The previous prime is 21883423. The next prime is 21883439. The reversal of 21883432 is 23438812.

It can be written as a sum of positive squares in 2 ways, for example, as 21585316 + 298116 = 4646^2 + 546^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21883394 and 21883403.

It is not an unprimeable number, because it can be changed into a prime (21883439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363 + ... + 6754.

Almost surely, 2^21883432 is an apocalyptic number.

It is an amenable number.

21883432 is a deficient number, since it is larger than the sum of its proper divisors (19274828).

21883432 is a wasteful number, since it uses less digits than its factorization.

21883432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8460 (or 8456 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 21883432 is about 4677.9730653350. The cubic root of 21883432 is about 279.7081653239.

The spelling of 21883432 in words is "twenty-one million, eight hundred eighty-three thousand, four hundred thirty-two".