18679995 has 12 divisors (see below), whose sum is σ = 32378736. Its totient is φ = 9962640.

The previous prime is 18679993. The next prime is 18680003. The reversal of 18679995 is 59997681.

It is not a de Polignac number, because 18679995 - 2¹ = 18679993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18679993) 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, 207511 + ... + 207600.

It is an arithmetic number, because the mean of its divisors is an integer number (2698228).

Almost surely, 2^18679995 is an apocalyptic number.

18679995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18679995 is a deficient number, since it is larger than the sum of its proper divisors (13698741).

18679995 is a wasteful number, since it uses less digits than its factorization.

18679995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415122 (or 415119 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 18679995 is about 4322.0359785638. The cubic root of 18679995 is about 265.3336014590. Note that the first 3 decimals are identical.

The spelling of 18679995 in words is "eighteen million, six hundred seventy-nine thousand, nine hundred ninety-five".