18505852434 has 20 divisors (see below), whose sum is σ = 41466817854. Its totient is φ = 6168617424.

The previous prime is 18505852381. The next prime is 18505852457. The reversal of 18505852434 is 43425850581.

18505852434 is a `hidden beast` number, since 18 + 5 + 0 + 585 + 24 + 34 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16691348025 + 1814504409 = 129195^2 + 42597^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18505852434.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 57116667 + ... + 57116990.

Almost surely, 2^18505852434 is an apocalyptic number.

18505852434 is an abundant number, since it is smaller than the sum of its proper divisors (22960965420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18505852434 is a wasteful number, since it uses less digits than its factorization.

18505852434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114233671 (or 114233662 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 18505852434 in words is "eighteen billion, five hundred five million, eight hundred fifty-two thousand, four hundred thirty-four".