22321904 has 40 divisors (see below), whose sum is σ = 48090672. Its totient is φ = 9950720.

The previous prime is 22321861. The next prime is 22321919. The reversal of 22321904 is 40912322.

It is a super-3 number, since 3×22321904³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22321904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8132 + ... + 10524.

Almost surely, 2^22321904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22321904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24045336).

22321904 is an abundant number, since it is smaller than the sum of its proper divisors (25768768).

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

22321904 is a wasteful number, since it uses less digits than its factorization.

22321904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 22321904 is about 4724.6062269781. The cubic root of 22321904 is about 281.5639691116.

The spelling of 22321904 in words is "twenty-two million, three hundred twenty-one thousand, nine hundred four".