21594230 has 16 divisors (see below), whose sum is σ = 44422560. Its totient is φ = 7403712.

The previous prime is 21594229. The next prime is 21594239. The reversal of 21594230 is 3249512.

It is a self number, because there is not a number n which added to its sum of digits gives 21594230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21594239) 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, 154175 + ... + 154314.

It is an arithmetic number, because the mean of its divisors is an integer number (2776410).

Almost surely, 2^21594230 is an apocalyptic number.

21594230 is an abundant number, since it is smaller than the sum of its proper divisors (22828330).

21594230 is a wasteful number, since it uses less digits than its factorization.

21594230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308503.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 21594230 is about 4646.9592208239. The cubic root of 21594230 is about 278.4705296902.

The spelling of 21594230 in words is "twenty-one million, five hundred ninety-four thousand, two hundred thirty".