20068538 has 12 divisors (see below), whose sum is σ = 35017722. Its totient is φ = 8600760.

The previous prime is 20068513. The next prime is 20068549. The reversal of 20068538 is 83586002.

It can be written as a sum of positive squares in only one way, i.e., 15976009 + 4092529 = 3997^2 + 2023^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102293 + ... + 102488.

Almost surely, 2^20068538 is an apocalyptic number.

20068538 is a deficient number, since it is larger than the sum of its proper divisors (14949184).

20068538 is a wasteful number, since it uses less digits than its factorization.

20068538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204797 (or 204790 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20068538 is about 4479.7921826799. The cubic root of 20068538 is about 271.7514760660.

The spelling of 20068538 in words is "twenty million, sixty-eight thousand, five hundred thirty-eight".