22045720 has 16 divisors (see below), whose sum is σ = 49602960. Its totient is φ = 8818272.

The previous prime is 22045711. The next prime is 22045729. The reversal of 22045720 is 2754022.

It is an interprime number because it is at equal distance from previous prime (22045711) and next prime (22045729).

It is a junction number, because it is equal to n+sod(n) for n = 22045691 and 22045700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22045729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275532 + ... + 275611.

It is an arithmetic number, because the mean of its divisors is an integer number (3100185).

Almost surely, 2^22045720 is an apocalyptic number.

22045720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22045720 is an abundant number, since it is smaller than the sum of its proper divisors (27557240).

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

22045720 is a wasteful number, since it uses less digits than its factorization.

22045720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551154 (or 551150 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 22045720 is about 4695.2869986828. The cubic root of 22045720 is about 280.3979036652.

Adding to 22045720 its reverse (2754022), we get a palindrome (24799742).

The spelling of 22045720 in words is "twenty-two million, forty-five thousand, seven hundred twenty".