18196938 has 24 divisors (see below), whose sum is σ = 40699776. Its totient is φ = 5869800.

The previous prime is 18196903. The next prime is 18196963. The reversal of 18196938 is 83969181.

It is a super-2 number, since 2×18196938² = 662257105151688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18196893 and 18196902.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15748 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (1695824).

Almost surely, 2^18196938 is an apocalyptic number.

18196938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18196938 is an abundant number, since it is smaller than the sum of its proper divisors (22502838).

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

18196938 is a wasteful number, since it uses less digits than its factorization.

18196938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32650 (or 32647 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 18196938 is about 4265.7869145094. The cubic root of 18196938 is about 263.0264590959.

The spelling of 18196938 in words is "eighteen million, one hundred ninety-six thousand, nine hundred thirty-eight".