18645516135 has 12 divisors (see below), whose sum is σ = 32318894712. Its totient is φ = 9944275248.

The previous prime is 18645516103. The next prime is 18645516181. The reversal of 18645516135 is 53161554681.

It is a happy number.

18645516135 is a `hidden beast` number, since 1 + 8 + 6 + 4 + 551 + 61 + 35 = 666.

It is not a de Polignac number, because 18645516135 - 2⁵ = 18645516103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 414344803 = 18645516135 / (1 + 8 + 6 + 4 + 5 + 5 + 1 + 6 + 1 + 3 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207172357 + ... + 207172446.

It is an arithmetic number, because the mean of its divisors is an integer number (2693241226).

Almost surely, 2^18645516135 is an apocalyptic number.

18645516135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18645516135 is a deficient number, since it is larger than the sum of its proper divisors (13673378577).

18645516135 is a wasteful number, since it uses less digits than its factorization.

18645516135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414344814 (or 414344811 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 18645516135 in words is "eighteen billion, six hundred forty-five million, five hundred sixteen thousand, one hundred thirty-five".