18706401792 has 600 divisors, whose sum is σ = 64423109916. Its totient is φ = 5382733824.

The previous prime is 18706401751. The next prime is 18706401817. The reversal of 18706401792 is 29710460781.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3334369536 + 15372032256 = 57744^2 + 123984^2 .

It is a super-2 number, since 2×18706401792² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 119148978 + ... + 119149134.

Almost surely, 2^18706401792 is an apocalyptic number.

18706401792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18706401792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32211554958).

18706401792 is an abundant number, since it is smaller than the sum of its proper divisors (45716708124).

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

18706401792 is a wasteful number, since it uses less digits than its factorization.

18706401792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 18706401792 in words is "eighteen billion, seven hundred six million, four hundred one thousand, seven hundred ninety-two".