18640195 has 16 divisors (see below), whose sum is σ = 25740288. Its totient is φ = 12693600.

The previous prime is 18640103. The next prime is 18640241. The reversal of 18640195 is 59104681.

It is not a de Polignac number, because 18640195 - 2⁷ = 18640067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18640195.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3522 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^18640195 is an apocalyptic number.

18640195 is a deficient number, since it is larger than the sum of its proper divisors (7100093).

18640195 is a wasteful number, since it uses less digits than its factorization.

18640195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18640195 is about 4317.4292119269. The cubic root of 18640195 is about 265.1450256374.

The spelling of 18640195 in words is "eighteen million, six hundred forty thousand, one hundred ninety-five".