18534435768 has 32 divisors (see below), whose sum is σ = 51484544400. Its totient is φ = 6178145184.

The previous prime is 18534435763. The next prime is 18534435781. The reversal of 18534435768 is 86753443581.

18534435768 is a `hidden beast` number, since 1 + 8 + 534 + 4 + 35 + 76 + 8 = 666.

It is a super-3 number, since 3×18534435768³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18534435763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42903571 + ... + 42904002.

Almost surely, 2^18534435768 is an apocalyptic number.

18534435768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18534435768 is an abundant number, since it is smaller than the sum of its proper divisors (32950108632).

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

18534435768 is a wasteful number, since it uses less digits than its factorization.

18534435768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85807588 (or 85807578 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 18534435768 in words is "eighteen billion, five hundred thirty-four million, four hundred thirty-five thousand, seven hundred sixty-eight".