18950839 has 4 divisors (see below), whose sum is σ = 19308456. Its totient is φ = 18593224.

The previous prime is 18950837. The next prime is 18950851. The reversal of 18950839 is 93805981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18950839 - 2¹ = 18950837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18950795 and 18950804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18950837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178729 + ... + 178834.

It is an arithmetic number, because the mean of its divisors is an integer number (4827114).

Almost surely, 2^18950839 is an apocalyptic number.

18950839 is a deficient number, since it is larger than the sum of its proper divisors (357617).

18950839 is an equidigital number, since it uses as much as digits as its factorization.

18950839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357616.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 18950839 is about 4353.2561376514. The cubic root of 18950839 is about 266.6098234743.

The spelling of 18950839 in words is "eighteen million, nine hundred fifty thousand, eight hundred thirty-nine".