18980835 has 16 divisors (see below), whose sum is σ = 31349760. Its totient is φ = 9796320.

The previous prime is 18980813. The next prime is 18980839. The reversal of 18980835 is 53808981.

It is not a de Polignac number, because 18980835 - 2⁸ = 18980579 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 19945 + ... + 20874.

It is an arithmetic number, because the mean of its divisors is an integer number (1959360).

Almost surely, 2^18980835 is an apocalyptic number.

18980835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18980835 is a deficient number, since it is larger than the sum of its proper divisors (12368925).

18980835 is a wasteful number, since it uses less digits than its factorization.

18980835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40858.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 18980835 is about 4356.7000126242. The cubic root of 18980835 is about 266.7504155355.

The spelling of 18980835 in words is "eighteen million, nine hundred eighty thousand, eight hundred thirty-five".