20118087 has 12 divisors (see below), whose sum is σ = 31701384. Its totient is φ = 12192720.

The previous prime is 20118073. The next prime is 20118097. The reversal of 20118087 is 78081102.

It is not a de Polignac number, because 20118087 - 2⁴ = 20118071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20118087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101508 + ... + 101705.

It is an arithmetic number, because the mean of its divisors is an integer number (2641782).

Almost surely, 2^20118087 is an apocalyptic number.

20118087 is a deficient number, since it is larger than the sum of its proper divisors (11583297).

20118087 is a wasteful number, since it uses less digits than its factorization.

20118087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203230 (or 203227 counting only the distinct ones).

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

The square root of 20118087 is about 4485.3190521968. The cubic root of 20118087 is about 271.9749427249.

Adding to 20118087 its reverse (78081102), we get a palindrome (98199189).

The spelling of 20118087 in words is "twenty million, one hundred eighteen thousand, eighty-seven".