18685633412235 has 16 divisors (see below), whose sum is σ = 29897075771136. Its totient is φ = 9965650382688.

The previous prime is 18685633412233. The next prime is 18685633412267. The reversal of 18685633412235 is 53221433658681.

It is not a de Polignac number, because 18685633412235 - 2¹ = 18685633412233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18685633412233) 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, 8547552 + ... + 10508658.

It is an arithmetic number, because the mean of its divisors is an integer number (1868567235696).

Almost surely, 2^{18685633412235} is an apocalyptic number.

18685633412235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18685633412235 is a deficient number, since it is larger than the sum of its proper divisors (11211442358901).

18685633412235 is a wasteful number, since it uses less digits than its factorization.

18685633412235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596322.

The product of its digits is 24883200, while the sum is 57.

The spelling of 18685633412235 in words is "eighteen trillion, six hundred eighty-five billion, six hundred thirty-three million, four hundred twelve thousand, two hundred thirty-five".