18980139 has 8 divisors (see below), whose sum is σ = 25377280. Its totient is φ = 12618216.

The previous prime is 18980113. The next prime is 18980141. The reversal of 18980139 is 93108981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18980139 - 2⁷ = 18980011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18980097 and 18980106.

It is not an unprimeable number, because it can be changed into a prime (18980839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7519 + ... + 9720.

It is an arithmetic number, because the mean of its divisors is an integer number (3172160).

Almost surely, 2^18980139 is an apocalyptic number.

18980139 is a deficient number, since it is larger than the sum of its proper divisors (6397141).

18980139 is a wasteful number, since it uses less digits than its factorization.

18980139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17609.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 18980139 is about 4356.6201349211. The cubic root of 18980139 is about 266.7471550439.

The spelling of 18980139 in words is "eighteen million, nine hundred eighty thousand, one hundred thirty-nine".