18051901418 has 16 divisors (see below), whose sum is σ = 28673160840. Its totient is φ = 8494273536.

The previous prime is 18051901403. The next prime is 18051901451. The reversal of 18051901418 is 81410915081.

It can be written as a sum of positive squares in 4 ways, for example, as 14019270409 + 4032631009 = 118403^2 + 63503^2 .

It is a super-2 number, since 2×18051901418² (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 7 ways as a sum of consecutive naturals, for example, 721730 + ... + 746322.

Almost surely, 2^18051901418 is an apocalyptic number.

18051901418 is a deficient number, since it is larger than the sum of its proper divisors (10621259422).

18051901418 is a wasteful number, since it uses less digits than its factorization.

18051901418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46201.

The product of its (nonzero) digits is 11520, while the sum is 38.

The spelling of 18051901418 in words is "eighteen billion, fifty-one million, nine hundred one thousand, four hundred eighteen".