21484908 has 18 divisors (see below), whose sum is σ = 54309164. Its totient is φ = 7161624.

The previous prime is 21484843. The next prime is 21484913. The reversal of 21484908 is 80948412.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 596803 = 21484908 / (2 + 1 + 4 + 8 + 4 + 9 + 0 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298366 + ... + 298437.

Almost surely, 2^21484908 is an apocalyptic number.

It is an amenable number.

21484908 is an abundant number, since it is smaller than the sum of its proper divisors (32824256).

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

21484908 is a wasteful number, since it uses less digits than its factorization.

21484908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596813 (or 596808 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 21484908 is about 4635.1815498425. The cubic root of 21484908 is about 277.9998102236. Note that the first 3 decimals are identical.

It can be divided in two parts, 2148 and 4908, that added together give a square (7056 = 84²).

The spelling of 21484908 in words is "twenty-one million, four hundred eighty-four thousand, nine hundred eight".