21169932 has 48 divisors (see below), whose sum is σ = 57775872. Its totient is φ = 5906880.

The previous prime is 21169921. The next prime is 21169937. The reversal of 21169932 is 23996112.

It is a junction number, because it is equal to n+sod(n) for n = 21169893 and 21169902.

It is not an unprimeable number, because it can be changed into a prime (21169937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (1203664).

Almost surely, 2^21169932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21169932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28887936).

21169932 is an abundant number, since it is smaller than the sum of its proper divisors (36605940).

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

21169932 is a wasteful number, since it uses less digits than its factorization.

21169932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918 (or 5916 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 21169932 is about 4601.0794385666. The cubic root of 21169932 is about 276.6345931433.

The spelling of 21169932 in words is "twenty-one million, one hundred sixty-nine thousand, nine hundred thirty-two".