21079332 has 48 divisors (see below), whose sum is σ = 55440000. Its totient is φ = 6924960.

The previous prime is 21079327. The next prime is 21079363. The reversal of 21079332 is 23397012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21079296 and 21079305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6294 + ... + 9042.

It is an arithmetic number, because the mean of its divisors is an integer number (1155000).

Almost surely, 2^21079332 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 21079332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27720000).

21079332 is an abundant number, since it is smaller than the sum of its proper divisors (34360668).

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

21079332 is a wasteful number, since it uses less digits than its factorization.

21079332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 21079332 is about 4591.2233663807. The cubic root of 21079332 is about 276.2393953192.

The spelling of 21079332 in words is "twenty-one million, seventy-nine thousand, three hundred thirty-two".