20138700 has 36 divisors (see below), whose sum is σ = 58268840. Its totient is φ = 5370240.

The previous prime is 20138669. The next prime is 20138707. The reversal of 20138700 is 783102.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20138707) 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, 33265 + ... + 33864.

Almost surely, 2^20138700 is an apocalyptic number.

20138700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20138700 is an abundant number, since it is smaller than the sum of its proper divisors (38130140).

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

20138700 is a wasteful number, since it uses less digits than its factorization.

20138700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67146 (or 67139 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20138700 is about 4487.6162937577. The cubic root of 20138700 is about 272.0677995635.

The spelling of 20138700 in words is "twenty million, one hundred thirty-eight thousand, seven hundred".