18974495 has 4 divisors (see below), whose sum is σ = 22769400. Its totient is φ = 15179592.

The previous prime is 18974491. The next prime is 18974507. The reversal of 18974495 is 59447981.

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 18974495 - 2² = 18974491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974491) 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, 1897445 + ... + 1897454.

It is an arithmetic number, because the mean of its divisors is an integer number (5692350).

Almost surely, 2^18974495 is an apocalyptic number.

18974495 is a deficient number, since it is larger than the sum of its proper divisors (3794905).

18974495 is an equidigital number, since it uses as much as digits as its factorization.

18974495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794904.

The product of its digits is 362880, while the sum is 47.

The square root of 18974495 is about 4355.9723369186. The cubic root of 18974495 is about 266.7207121361.

The spelling of 18974495 in words is "eighteen million, nine hundred seventy-four thousand, four hundred ninety-five".