18222260040 has 128 divisors (see below), whose sum is σ = 62700364800. Its totient is φ = 4702510080.

The previous prime is 18222260029. The next prime is 18222260041. The reversal of 18222260040 is 4006222281.

It is a happy number.

18222260040 is a `hidden beast` number, since 18 + 2 + 2 + 2 + 2 + 600 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18222259986 and 18222260013.

It is not an unprimeable number, because it can be changed into a prime (18222260041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238657 + ... + 305616.

It is an arithmetic number, because the mean of its divisors is an integer number (489846600).

Almost surely, 2^18222260040 is an apocalyptic number.

18222260040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18222260040 is an abundant number, since it is smaller than the sum of its proper divisors (44478104760).

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

18222260040 is a wasteful number, since it uses less digits than its factorization.

18222260040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544324 (or 544314 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The spelling of 18222260040 in words is "eighteen billion, two hundred twenty-two million, two hundred sixty thousand, forty".