18757516349 has 12 divisors (see below), whose sum is σ = 22157885952. Its totient is φ = 15740571600.

The previous prime is 18757516313. The next prime is 18757516387. The reversal of 18757516349 is 94361575781.

It is a happy number.

It is not a de Polignac number, because 18757516349 - 2⁸ = 18757516093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18757516294 and 18757516303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18757518349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5043197 + ... + 5046914.

It is an arithmetic number, because the mean of its divisors is an integer number (1846490496).

Almost surely, 2^18757516349 is an apocalyptic number.

It is an amenable number.

18757516349 is a deficient number, since it is larger than the sum of its proper divisors (3400369603).

18757516349 is a wasteful number, since it uses less digits than its factorization.

18757516349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090148 (or 10090135 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 56.

The spelling of 18757516349 in words is "eighteen billion, seven hundred fifty-seven million, five hundred sixteen thousand, three hundred forty-nine".