20118904695 has 12 divisors (see below), whose sum is σ = 34872768216. Its totient is φ = 10730082480.

The previous prime is 20118904679. The next prime is 20118904709. The reversal of 20118904695 is 59640981102.

20118904695 is a `hidden beast` number, since 2 + 0 + 1 + 189 + 0 + 469 + 5 = 666.

It is not a de Polignac number, because 20118904695 - 2⁴ = 20118904679 is a prime.

It is a super-2 number, since 2×20118904695² (a number of 21 digits) contains 22 as substring.

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: 447086771 = 20118904695 / (2 + 0 + 1 + 1 + 8 + 9 + 0 + 4 + 6 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 20118904695.

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, 223543341 + ... + 223543430.

It is an arithmetic number, because the mean of its divisors is an integer number (2906064018).

Almost surely, 2^20118904695 is an apocalyptic number.

20118904695 is a deficient number, since it is larger than the sum of its proper divisors (14753863521).

20118904695 is a wasteful number, since it uses less digits than its factorization.

20118904695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447086782 (or 447086779 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 20118904695 in words is "twenty billion, one hundred eighteen million, nine hundred four thousand, six hundred ninety-five".