22421620 has 48 divisors (see below), whose sum is σ = 51367680. Its totient is φ = 8171136.

The previous prime is 22421599. The next prime is 22421677. The reversal of 22421620 is 2612422.

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, 21061 + ... + 22099.

It is an arithmetic number, because the mean of its divisors is an integer number (1070160).

Almost surely, 2^22421620 is an apocalyptic number.

22421620 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 22421620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25683840).

22421620 is an abundant number, since it is smaller than the sum of its proper divisors (28946060).

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

22421620 is a wasteful number, since it uses less digits than its factorization.

22421620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22421620 is about 4735.1473049949. The cubic root of 22421620 is about 281.9826121432.

The spelling of 22421620 in words is "twenty-two million, four hundred twenty-one thousand, six hundred twenty".