18520086937 has 8 divisors (see below), whose sum is σ = 20209973472. Its totient is φ = 16831240800.

The previous prime is 18520086931. The next prime is 18520086953. The reversal of 18520086937 is 73968002581.

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

It is a de Polignac number, because none of the positive numbers 2^k-18520086937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18520086931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222639 + ... + 294292.

It is an arithmetic number, because the mean of its divisors is an integer number (2526246684).

Almost surely, 2^18520086937 is an apocalyptic number.

It is an amenable number.

18520086937 is a deficient number, since it is larger than the sum of its proper divisors (1689886535).

18520086937 is a wasteful number, since it uses less digits than its factorization.

18520086937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520199.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18520086937 in words is "eighteen billion, five hundred twenty million, eighty-six thousand, nine hundred thirty-seven".