22365720 has 224 divisors, whose sum is σ = 82630800. Its totient is φ = 5412096.

The previous prime is 22365709. The next prime is 22365731. The reversal of 22365720 is 2756322.

22365720 is a `hidden beast` number, since 2 + 2 + 3 + 657 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (22365709) and next prime (22365731).

It is a super-2 number, since 2×22365720² = 1000450862236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 379051 + ... + 379109.

Almost surely, 2^22365720 is an apocalyptic number.

22365720 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 22365720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41315400).

22365720 is an abundant number, since it is smaller than the sum of its proper divisors (60265080).

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

22365720 is a wasteful number, since it uses less digits than its factorization.

22365720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 22365720 is about 4729.2409538952. The cubic root of 22365720 is about 281.7480774131.

The spelling of 22365720 in words is "twenty-two million, three hundred sixty-five thousand, seven hundred twenty".