21856162 has 8 divisors (see below), whose sum is σ = 32832000. Its totient is φ = 10912164.

The previous prime is 21856151. The next prime is 21856189. The reversal of 21856162 is 26165812.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 6162 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (4104000).

Almost surely, 2^21856162 is an apocalyptic number.

21856162 is a deficient number, since it is larger than the sum of its proper divisors (10975838).

21856162 is a wasteful number, since it uses less digits than its factorization.

21856162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15920.

The product of its digits is 5760, while the sum is 31.

The square root of 21856162 is about 4675.0574328023. The cubic root of 21856162 is about 279.5919310840.

The spelling of 21856162 in words is "twenty-one million, eight hundred fifty-six thousand, one hundred sixty-two".