22163740 has 48 divisors (see below), whose sum is σ = 48684384. Its totient is φ = 8467200.

The previous prime is 22163737. The next prime is 22163741. The reversal of 22163740 is 4736122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22163741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44895 + ... + 45385.

It is an arithmetic number, because the mean of its divisors is an integer number (1014258).

Almost surely, 2^22163740 is an apocalyptic number.

22163740 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 22163740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24342192).

22163740 is an abundant number, since it is smaller than the sum of its proper divisors (26520644).

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

22163740 is a wasteful number, since it uses less digits than its factorization.

22163740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 22163740 is about 4707.8381450513. The cubic root of 22163740 is about 280.8973760163.

Adding to 22163740 its reverse (4736122), we get a palindrome (26899862).

The spelling of 22163740 in words is "twenty-two million, one hundred sixty-three thousand, seven hundred forty".