20018944 has 36 divisors (see below), whose sum is σ = 43598520. Its totient is φ = 9098240.

The previous prime is 20018941. The next prime is 20018953. The reversal of 20018944 is 44981002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018941) 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, 739 + ... + 6370.

It is an arithmetic number, because the mean of its divisors is an integer number (1211070).

Almost surely, 2^20018944 is an apocalyptic number.

It is an amenable number.

20018944 is an abundant number, since it is smaller than the sum of its proper divisors (23579576).

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

20018944 is an equidigital number, since it uses as much as digits as its factorization.

20018944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136 (or 7122 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20018944 is about 4474.2534572820. The cubic root of 20018944 is about 271.5274378266.

Adding to 20018944 its reverse (44981002), we get a palindrome (64999946).

The spelling of 20018944 in words is "twenty million, eighteen thousand, nine hundred forty-four".