20108700 has 54 divisors (see below), whose sum is σ = 63032424. Its totient is φ = 5362080.

The previous prime is 20108657. The next prime is 20108729. The reversal of 20108700 is 780102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10272 + ... + 12071.

Almost surely, 2^20108700 is an apocalyptic number.

20108700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20108700 is an abundant number, since it is smaller than the sum of its proper divisors (42923724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20108700 is a wasteful number, since it uses less digits than its factorization.

20108700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22363 (or 22353 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 20108700 is about 4484.2725162505. The cubic root of 20108700 is about 271.9326354226.

Adding to 20108700 its reverse (780102), we get a palindrome (20888802).

The spelling of 20108700 in words is "twenty million, one hundred eight thousand, seven hundred".