21866482 has 16 divisors (see below), whose sum is σ = 36749952. Its totient is φ = 9670320.

The previous prime is 21866477. The next prime is 21866483. The reversal of 21866482 is 28466812.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (21866483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12618 + ... + 14245.

It is an arithmetic number, because the mean of its divisors is an integer number (2296872).

Almost surely, 2^21866482 is an apocalyptic number.

21866482 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21866482 is a deficient number, since it is larger than the sum of its proper divisors (14883470).

21866482 is a wasteful number, since it uses less digits than its factorization.

21866482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26913.

The product of its digits is 36864, while the sum is 37.

The square root of 21866482 is about 4676.1610322999. The cubic root of 21866482 is about 279.6359298841.

It can be divided in two parts, 2186 and 6482, that added together give a palindrome (8668).

The spelling of 21866482 in words is "twenty-one million, eight hundred sixty-six thousand, four hundred eighty-two".