21560132 has 12 divisors (see below), whose sum is σ = 41160336. Its totient is φ = 9800040.

The previous prime is 21560129. The next prime is 21560141. The reversal of 21560132 is 23106512.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244958 + ... + 245045.

It is an arithmetic number, because the mean of its divisors is an integer number (3430028).

Almost surely, 2^21560132 is an apocalyptic number.

21560132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21560132 is a deficient number, since it is larger than the sum of its proper divisors (19600204).

21560132 is a wasteful number, since it uses less digits than its factorization.

21560132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490018 (or 490016 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 21560132 is about 4643.2889205820. The cubic root of 21560132 is about 278.3238810978.

Adding to 21560132 its reverse (23106512), we get a palindrome (44666644).

The spelling of 21560132 in words is "twenty-one million, five hundred sixty thousand, one hundred thirty-two".