18800040418 has 8 divisors (see below), whose sum is σ = 28201976748. Its totient is φ = 9399381504.

The previous prime is 18800040377. The next prime is 18800040419. The reversal of 18800040418 is 81404000881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18416389849 + 383650569 = 135707^2 + 19587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18800040418² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18800040419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281671 + ... + 341962.

Almost surely, 2^18800040418 is an apocalyptic number.

18800040418 is a deficient number, since it is larger than the sum of its proper divisors (9401936330).

18800040418 is a wasteful number, since it uses less digits than its factorization.

18800040418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638708.

The product of its (nonzero) digits is 8192, while the sum is 34.

The spelling of 18800040418 in words is "eighteen billion, eight hundred million, forty thousand, four hundred eighteen".