22018200400 has 60 divisors (see below), whose sum is σ = 60455695072. Its totient is φ = 7549096320.

The previous prime is 22018200343. The next prime is 22018200427. The reversal of 22018200400 is 400281022.

It is a super-2 number, since 2×22018200400² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3929022 + ... + 3934621.

Almost surely, 2^22018200400 is an apocalyptic number.

22018200400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22018200400 is an abundant number, since it is smaller than the sum of its proper divisors (38437494672).

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

22018200400 is a wasteful number, since it uses less digits than its factorization.

22018200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863668 (or 7863657 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22018200400 its reverse (400281022), we get a palindrome (22418481422).

The spelling of 22018200400 in words is "twenty-two billion, eighteen million, two hundred thousand, four hundred".