18980079 has 8 divisors (see below), whose sum is σ = 25342080. Its totient is φ = 12635736.

The previous prime is 18980077. The next prime is 18980099. The reversal of 18980079 is 97008981.

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

It is not a de Polignac number, because 18980079 - 2¹ = 18980077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18980079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980077) 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, 1659 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (3167760).

Almost surely, 2^18980079 is an apocalyptic number.

18980079 is a deficient number, since it is larger than the sum of its proper divisors (6362001).

18980079 is an equidigital number, since it uses as much as digits as its factorization.

18980079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8829.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 18980079 is about 4356.6132488436. The cubic root of 18980079 is about 266.7468739633.

The spelling of 18980079 in words is "eighteen million, nine hundred eighty thousand, seventy-nine".