20188954107 has 20 divisors (see below), whose sum is σ = 34467210096. Its totient is φ = 11536544880.

The previous prime is 20188954103. The next prime is 20188954141. The reversal of 20188954107 is 70145988102.

20188954107 is a `hidden beast` number, since 20 + 1 + 8 + 89 + 541 + 0 + 7 = 666.

It is not a de Polignac number, because 20188954107 - 2² = 20188954103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20188954103) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17802744 + ... + 17803877.

Almost surely, 2^20188954107 is an apocalyptic number.

20188954107 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20188954107 is a deficient number, since it is larger than the sum of its proper divisors (14278255989).

20188954107 is an equidigital number, since it uses as much as digits as its factorization.

20188954107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35606640 (or 35606631 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 20188954107 in words is "twenty billion, one hundred eighty-eight million, nine hundred fifty-four thousand, one hundred seven".