22146720 has 192 divisors, whose sum is σ = 75841920. Its totient is φ = 5419008.

The previous prime is 22146713. The next prime is 22146737. The reversal of 22146720 is 2764122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515019 + ... + 515061.

It is an arithmetic number, because the mean of its divisors is an integer number (395010).

Almost surely, 2^22146720 is an apocalyptic number.

22146720 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 22146720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37920960).

22146720 is an abundant number, since it is smaller than the sum of its proper divisors (53695200).

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

22146720 is a wasteful number, since it uses less digits than its factorization.

22146720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 22146720 is about 4706.0301741489. The cubic root of 22146720 is about 280.8254552779.

The spelling of 22146720 in words is "twenty-two million, one hundred forty-six thousand, seven hundred twenty".