20618758318 has 8 divisors (see below), whose sum is σ = 30929781960. Its totient is φ = 10308831000.

The previous prime is 20618758297. The next prime is 20618758327. The reversal of 20618758318 is 81385781602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225328 + ... + 303331.

It is an arithmetic number, because the mean of its divisors is an integer number (3866222745).

Almost surely, 2^20618758318 is an apocalyptic number.

20618758318 is a deficient number, since it is larger than the sum of its proper divisors (10311023642).

20618758318 is a wasteful number, since it uses less digits than its factorization.

20618758318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548162.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 20618758318 in words is "twenty billion, six hundred eighteen million, seven hundred fifty-eight thousand, three hundred eighteen".