18954891340 has 96 divisors (see below), whose sum is σ = 52239398400. Its totient is φ = 5597061120.

The previous prime is 18954891311. The next prime is 18954891407. The reversal of 18954891340 is 4319845981.

It is a super-2 number, since 2×18954891340² (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 31 ways as a sum of consecutive naturals, for example, 294645 + ... + 353164.

It is an arithmetic number, because the mean of its divisors is an integer number (544160400).

Almost surely, 2^18954891340 is an apocalyptic number.

18954891340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18954891340 is an abundant number, since it is smaller than the sum of its proper divisors (33284507060).

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

18954891340 is a wasteful number, since it uses less digits than its factorization.

18954891340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647855 (or 647853 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 18954891340 in words is "eighteen billion, nine hundred fifty-four million, eight hundred ninety-one thousand, three hundred forty".