18508748461 has 16 divisors (see below), whose sum is σ = 21366661888. Its totient is φ = 15704409600.

The previous prime is 18508748437. The next prime is 18508748497. The reversal of 18508748461 is 16484780581.

It is a cyclic number.

It is not a de Polignac number, because 18508748461 - 2⁵ = 18508748429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18508748399 and 18508748408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518748461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3502141 + ... + 3507421.

It is an arithmetic number, because the mean of its divisors is an integer number (1335416368).

Almost surely, 2^18508748461 is an apocalyptic number.

It is an amenable number.

18508748461 is a deficient number, since it is larger than the sum of its proper divisors (2857913427).

18508748461 is a wasteful number, since it uses less digits than its factorization.

18508748461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252.

The product of its (nonzero) digits is 1720320, while the sum is 52.

The spelling of 18508748461 in words is "eighteen billion, five hundred eight million, seven hundred forty-eight thousand, four hundred sixty-one".