20188107 has 6 divisors (see below), whose sum is σ = 29160612. Its totient is φ = 13458732.

The previous prime is 20188081. The next prime is 20188109. The reversal of 20188107 is 70188102.

It is not a de Polignac number, because 20188107 - 2¹² = 20184011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20188109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121553 + ... + 1121570.

It is an arithmetic number, because the mean of its divisors is an integer number (4860102).

Almost surely, 2^20188107 is an apocalyptic number.

20188107 is a deficient number, since it is larger than the sum of its proper divisors (8972505).

20188107 is a wasteful number, since it uses less digits than its factorization.

20188107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243129 (or 2243126 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 20188107 is about 4493.1177371620. The cubic root of 20188107 is about 272.2901091152.

The spelling of 20188107 in words is "twenty million, one hundred eighty-eight thousand, one hundred seven".