22144020 has 24 divisors (see below), whose sum is σ = 62003424. Its totient is φ = 5905056.

The previous prime is 22144007. The next prime is 22144021. The reversal of 22144020 is 2044122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184474 + ... + 184593.

It is an arithmetic number, because the mean of its divisors is an integer number (2583476).

Almost surely, 2^22144020 is an apocalyptic number.

22144020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22144020 is an abundant number, since it is smaller than the sum of its proper divisors (39859404).

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

22144020 is a wasteful number, since it uses less digits than its factorization.

22144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369079 (or 369077 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22144020 is about 4705.7432994162. The cubic root of 22144020 is about 280.8140426091.

Adding to 22144020 its reverse (2044122), we get a palindrome (24188142).

The spelling of 22144020 in words is "twenty-two million, one hundred forty-four thousand, twenty".