22813720 has 64 divisors (see below), whose sum is σ = 54043200. Its totient is φ = 8655360.

The previous prime is 22813717. The next prime is 22813733. The reversal of 22813720 is 2731822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82222 + ... + 82498.

It is an arithmetic number, because the mean of its divisors is an integer number (844425).

Almost surely, 2^22813720 is an apocalyptic number.

22813720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22813720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27021600).

22813720 is an abundant number, since it is smaller than the sum of its proper divisors (31229480).

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

22813720 is a wasteful number, since it uses less digits than its factorization.

22813720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 22813720 is about 4776.3710073653. The cubic root of 22813720 is about 283.6168542206.

The spelling of 22813720 in words is "twenty-two million, eight hundred thirteen thousand, seven hundred twenty".