22018363840 has 56 divisors (see below), whose sum is σ = 57197713392. Its totient is φ = 8006676480.

The previous prime is 22018363819. The next prime is 22018363849. The reversal of 22018363840 is 4836381022.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22018363840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018363849) 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, 3124089 + ... + 3131128.

Almost surely, 2^22018363840 is an apocalyptic number.

22018363840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22018363840 is an abundant number, since it is smaller than the sum of its proper divisors (35179349552).

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

22018363840 is a wasteful number, since it uses less digits than its factorization.

22018363840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6255245 (or 6255235 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 22018363840 in words is "twenty-two billion, eighteen million, three hundred sixty-three thousand, eight hundred forty".