20180104 has 32 divisors (see below), whose sum is σ = 43513920. Its totient is φ = 8594496.

The previous prime is 20180087. The next prime is 20180123. The reversal of 20180104 is 40108102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8647 + ... + 10729.

It is an arithmetic number, because the mean of its divisors is an integer number (1359810).

Almost surely, 2^20180104 is an apocalyptic number.

It is an amenable number.

20180104 is an abundant number, since it is smaller than the sum of its proper divisors (23333816).

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

20180104 is a wasteful number, since it uses less digits than its factorization.

20180104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2265 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20180104 is about 4492.2270646084. The cubic root of 20180104 is about 272.2541238069.

Adding to 20180104 its reverse (40108102), we get a palindrome (60288206).

The spelling of 20180104 in words is "twenty million, one hundred eighty thousand, one hundred four".