18506968040 has 64 divisors (see below), whose sum is σ = 45539910720. Its totient is φ = 6712960000.

The previous prime is 18506968021. The next prime is 18506968061. The reversal of 18506968040 is 4086960581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123995 + ... + 228885.

It is an arithmetic number, because the mean of its divisors is an integer number (711561105).

Almost surely, 2^18506968040 is an apocalyptic number.

18506968040 is a gapful number since it is divisible by the number (10) 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 18506968040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22769955360).

18506968040 is an abundant number, since it is smaller than the sum of its proper divisors (27032942680).

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

18506968040 is a wasteful number, since it uses less digits than its factorization.

18506968040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105314 (or 105310 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 18506968040 in words is "eighteen billion, five hundred six million, nine hundred sixty-eight thousand, forty".