18750768505 has 48 divisors (see below), whose sum is σ = 26730213840. Its totient is φ = 12585850368.

The previous prime is 18750768481. The next prime is 18750768523. The reversal of 18750768505 is 50586705781.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 141443449 + 18609325056 = 11893^2 + 136416^2 .

It is not a de Polignac number, because 18750768505 - 2¹⁹ = 18750244217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6607947 + ... + 6610783.

It is an arithmetic number, because the mean of its divisors is an integer number (556879455).

Almost surely, 2^18750768505 is an apocalyptic number.

It is an amenable number.

18750768505 is a deficient number, since it is larger than the sum of its proper divisors (7979445335).

18750768505 is a wasteful number, since it uses less digits than its factorization.

18750768505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 52.

The spelling of 18750768505 in words is "eighteen billion, seven hundred fifty million, seven hundred sixty-eight thousand, five hundred five".