18123936 has 24 divisors (see below), whose sum is σ = 47575584. Its totient is φ = 6041280.

The previous prime is 18123901. The next prime is 18123947. The reversal of 18123936 is 63932181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×18123936² = 656954112264192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18123897 and 18123906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94300 + ... + 94491.

It is an arithmetic number, because the mean of its divisors is an integer number (1982316).

Almost surely, 2^18123936 is an apocalyptic number.

18123936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18123936 is an abundant number, since it is smaller than the sum of its proper divisors (29451648).

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

18123936 is a wasteful number, since it uses less digits than its factorization.

18123936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188804 (or 188796 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 18123936 is about 4257.2216291849. The cubic root of 18123936 is about 262.6742534620.

The spelling of 18123936 in words is "eighteen million, one hundred twenty-three thousand, nine hundred thirty-six".