20944818 has 20 divisors (see below), whose sum is σ = 46932270. Its totient is φ = 6981552.

The previous prime is 20944817. The next prime is 20944831. The reversal of 20944818 is 81844902.

20944818 is a `hidden beast` number, since 209 + 448 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 4028049 = 4113^2 + 2007^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20944811) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 64483 + ... + 64806.

Almost surely, 2^20944818 is an apocalyptic number.

20944818 is an abundant number, since it is smaller than the sum of its proper divisors (25987452).

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

20944818 is a wasteful number, since it uses less digits than its factorization.

20944818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129303 (or 129294 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 20944818 is about 4576.5508846729. The cubic root of 20944818 is about 275.6505501790.

The spelling of 20944818 in words is "twenty million, nine hundred forty-four thousand, eight hundred eighteen".