21338160 has 80 divisors (see below), whose sum is σ = 67186176. Its totient is φ = 5601024.

The previous prime is 21338153. The next prime is 21338183. The reversal of 21338160 is 6183312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21338160.

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, 15417 + ... + 16743.

Almost surely, 2^21338160 is an apocalyptic number.

21338160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21338160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33593088).

21338160 is an abundant number, since it is smaller than the sum of its proper divisors (45848016).

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

21338160 is a wasteful number, since it uses less digits than its factorization.

21338160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21338160 is about 4619.3246259599. The cubic root of 21338160 is about 277.3654245614.

The spelling of 21338160 in words is "twenty-one million, three hundred thirty-eight thousand, one hundred sixty".