18022794012 has 36 divisors (see below), whose sum is σ = 47027221696. Its totient is φ = 5813804160.

The previous prime is 18022794011. The next prime is 18022794047. The reversal of 18022794012 is 21049722081.

18022794012 is a `hidden beast` number, since 180 + 2 + 2 + 79 + 401 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×18022794012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022794011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8073613 + ... + 8075844.

Almost surely, 2^18022794012 is an apocalyptic number.

18022794012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18022794012 is an abundant number, since it is smaller than the sum of its proper divisors (29004427684).

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

18022794012 is a wasteful number, since it uses less digits than its factorization.

18022794012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16149498 (or 16149493 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 18022794012 in words is "eighteen billion, twenty-two million, seven hundred ninety-four thousand, twelve".