20180139 has 16 divisors (see below), whose sum is σ = 32560128. Its totient is φ = 10852992.

The previous prime is 20180123. The next prime is 20180141. The reversal of 20180139 is 93108102.

It is not a de Polignac number, because 20180139 - 2⁴ = 20180123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20180179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27907 + ... + 28620.

It is an arithmetic number, because the mean of its divisors is an integer number (2035008).

Almost surely, 2^20180139 is an apocalyptic number.

20180139 is a deficient number, since it is larger than the sum of its proper divisors (12379989).

20180139 is a wasteful number, since it uses less digits than its factorization.

20180139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56554.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 20180139 is about 4492.2309602246. The cubic root of 20180139 is about 272.2542812044.

The spelling of 20180139 in words is "twenty million, one hundred eighty thousand, one hundred thirty-nine".