18196908 has 24 divisors (see below), whose sum is σ = 44694720. Its totient is φ = 5746320.

The previous prime is 18196903. The next prime is 18196963. The reversal of 18196908 is 80969181.

It is a super-2 number, since 2×18196908² = 662254921520928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18196908.

It is not an unprimeable number, because it can be changed into a prime (18196901) 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, 39678 + ... + 40133.

It is an arithmetic number, because the mean of its divisors is an integer number (1862280).

Almost surely, 2^18196908 is an apocalyptic number.

It is an amenable number.

18196908 is an abundant number, since it is smaller than the sum of its proper divisors (26497812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18196908 is a wasteful number, since it uses less digits than its factorization.

18196908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79837 (or 79835 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 18196908 is about 4265.7833981580. The cubic root of 18196908 is about 263.0263145515.

The spelling of 18196908 in words is "eighteen million, one hundred ninety-six thousand, nine hundred eight".