21814364 has 36 divisors (see below), whose sum is σ = 45201912. Its totient is φ = 9150240.

The previous prime is 21814363. The next prime is 21814367. The reversal of 21814364 is 46341812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4559 + ... + 8025.

Almost surely, 2^21814364 is an apocalyptic number.

It is an amenable number.

21814364 is an abundant number, since it is smaller than the sum of its proper divisors (23387548).

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

21814364 is a wasteful number, since it uses less digits than its factorization.

21814364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3493 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 21814364 is about 4670.5849740691. The cubic root of 21814364 is about 279.4135856332.

The spelling of 21814364 in words is "twenty-one million, eight hundred fourteen thousand, three hundred sixty-four".