18616995 has 12 divisors (see below), whose sum is σ = 32269536. Its totient is φ = 9929040.

The previous prime is 18616987. The next prime is 18616999. The reversal of 18616995 is 59961681.

It is not a de Polignac number, because 18616995 - 2³ = 18616987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 413711 = 18616995 / (1 + 8 + 6 + 1 + 6 + 9 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 18616995.

It is not an unprimeable number, because it can be changed into a prime (18616999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206811 + ... + 206900.

It is an arithmetic number, because the mean of its divisors is an integer number (2689128).

Almost surely, 2^18616995 is an apocalyptic number.

18616995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18616995 is a deficient number, since it is larger than the sum of its proper divisors (13652541).

18616995 is a wasteful number, since it uses less digits than its factorization.

18616995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413722 (or 413719 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 18616995 is about 4314.7415913355. The cubic root of 18616995 is about 265.0349781763.

The spelling of 18616995 in words is "eighteen million, six hundred sixteen thousand, nine hundred ninety-five".