18518516670 has 64 divisors (see below), whose sum is σ = 47209573440. Its totient is φ = 4632895488.

The previous prime is 18518516659. The next prime is 18518516711. The reversal of 18518516670 is 7661581581.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 101626 + ... + 217634.

It is an arithmetic number, because the mean of its divisors is an integer number (737649585).

Almost surely, 2^18518516670 is an apocalyptic number.

18518516670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18518516670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23604786720).

18518516670 is an abundant number, since it is smaller than the sum of its proper divisors (28691056770).

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

18518516670 is a wasteful number, since it uses less digits than its factorization.

18518516670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116349.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 18518516670 in words is "eighteen billion, five hundred eighteen million, five hundred sixteen thousand, six hundred seventy".