22421736 has 48 divisors (see below), whose sum is σ = 61304100. Its totient is φ = 7402752.

The previous prime is 22421699. The next prime is 22421747. The reversal of 22421736 is 63712422.

It can be written as a sum of positive squares in 2 ways, for example, as 21622500 + 799236 = 4650^2 + 894^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6420 + ... + 9276.

Almost surely, 2^22421736 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 22421736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30652050).

22421736 is an abundant number, since it is smaller than the sum of its proper divisors (38882364).

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

22421736 is a wasteful number, since it uses less digits than its factorization.

22421736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978 (or 2971 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 22421736 is about 4735.1595538060. The cubic root of 22421736 is about 281.9830984287.

Adding to 22421736 its product of digits (4032), we get a cube (22425768 = 282³).

The spelling of 22421736 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred thirty-six".