21885162 has 48 divisors (see below), whose sum is σ = 48066048. Its totient is φ = 6639360.

The previous prime is 21885161. The next prime is 21885173. The reversal of 21885162 is 26158812.

It is not an unprimeable number, because it can be changed into a prime (21885161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114487 + ... + 114677.

It is an arithmetic number, because the mean of its divisors is an integer number (1001376).

Almost surely, 2^21885162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21885162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24033024).

21885162 is an abundant number, since it is smaller than the sum of its proper divisors (26180886).

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

21885162 is a wasteful number, since it uses less digits than its factorization.

21885162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 322 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 21885162 is about 4678.1579708257. The cubic root of 21885162 is about 279.7155359285.

The spelling of 21885162 in words is "twenty-one million, eight hundred eighty-five thousand, one hundred sixty-two".