18980895 has 8 divisors (see below), whose sum is σ = 30369456. Its totient is φ = 10123136.

The previous prime is 18980893. The next prime is 18980947. The reversal of 18980895 is 59808981.

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

It is a cyclic number.

It is not a de Polignac number, because 18980895 - 2¹ = 18980893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980893) 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, 632682 + ... + 632711.

It is an arithmetic number, because the mean of its divisors is an integer number (3796182).

Almost surely, 2^18980895 is an apocalyptic number.

18980895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18980895 is a deficient number, since it is larger than the sum of its proper divisors (11388561).

18980895 is a wasteful number, since it uses less digits than its factorization.

18980895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265401.

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 18980895 is about 4356.7068985646. The cubic root of 18980895 is about 266.7506966086.

The spelling of 18980895 in words is "eighteen million, nine hundred eighty thousand, eight hundred ninety-five".