18119991960 has 192 divisors, whose sum is σ = 71261985600. Its totient is φ = 3898073088.

The previous prime is 18119991949. The next prime is 18119991971. The reversal of 18119991960 is 6919991181.

It is an interprime number because it is at equal distance from previous prime (18119991949) and next prime (18119991971).

It is a super-3 number, since 3×18119991960³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18119991897 and 18119991906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168645 + ... + 254324.

It is an arithmetic number, because the mean of its divisors is an integer number (371156175).

Almost surely, 2^18119991960 is an apocalyptic number.

18119991960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18119991960 is an abundant number, since it is smaller than the sum of its proper divisors (53141993640).

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

18119991960 is a wasteful number, since it uses less digits than its factorization.

18119991960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423010 (or 423003 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 54.

The spelling of 18119991960 in words is "eighteen billion, one hundred nineteen million, nine hundred ninety-one thousand, nine hundred sixty".