20138068 has 12 divisors (see below), whose sum is σ = 35289940. Its totient is φ = 10055232.

The previous prime is 20138033. The next prime is 20138071. The reversal of 20138068 is 86083102.

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 4787344 = 3918^2 + 2188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280 + ... + 6352.

Almost surely, 2^20138068 is an apocalyptic number.

It is an amenable number.

20138068 is a deficient number, since it is larger than the sum of its proper divisors (15151872).

20138068 is a wasteful number, since it uses less digits than its factorization.

20138068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20138068 is about 4487.5458772028. The cubic root of 20138068 is about 272.0649534902.

The spelling of 20138068 in words is "twenty million, one hundred thirty-eight thousand, sixty-eight".