22643020 has 48 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 8602560.

The previous prime is 22642999. The next prime is 22643021. The reversal of 22643020 is 2034622.

22643020 = 266² + 267² + ... + 442².

It is a super-3 number, since 3×22643020³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643021) 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, 36271 + ... + 36889.

It is an arithmetic number, because the mean of its divisors is an integer number (1041600).

Almost surely, 2^22643020 is an apocalyptic number.

22643020 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 22643020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24998400).

22643020 is an abundant number, since it is smaller than the sum of its proper divisors (27353780).

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

22643020 is a wasteful number, since it uses less digits than its factorization.

22643020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22643020 is about 4758.4682409364. The cubic root of 22643020 is about 282.9077100454.

Adding to 22643020 its reverse (2034622), we get a palindrome (24677642).

The spelling of 22643020 in words is "twenty-two million, six hundred forty-three thousand, twenty".