21886896 has 20 divisors (see below), whose sum is σ = 56541272. Its totient is φ = 7295616.

The previous prime is 21886883. The next prime is 21886919. The reversal of 21886896 is 69868812.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 455977 = 21886896 / (2 + 1 + 8 + 8 + 6 + 8 + 9 + 6).

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, 227941 + ... + 228036.

Almost surely, 2^21886896 is an apocalyptic number.

It is an amenable number.

21886896 is an abundant number, since it is smaller than the sum of its proper divisors (34654376).

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

21886896 is a wasteful number, since it uses less digits than its factorization.

21886896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455988 (or 455982 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 21886896 is about 4678.3432965100. The cubic root of 21886896 is about 279.7229231852.

The spelling of 21886896 in words is "twenty-one million, eight hundred eighty-six thousand, eight hundred ninety-six".