18404102 has 4 divisors (see below), whose sum is σ = 27606156. Its totient is φ = 9202050.

The previous prime is 18404083. The next prime is 18404137. The reversal of 18404102 is 20140481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20140481 = 73 ⋅275897.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4601024 + ... + 4601027.

It is an arithmetic number, because the mean of its divisors is an integer number (6901539).

Almost surely, 2^18404102 is an apocalyptic number.

18404102 is a deficient number, since it is larger than the sum of its proper divisors (9202054).

18404102 is an equidigital number, since it uses as much as digits as its factorization.

18404102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9202053.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18404102 is about 4290.0002331002. Note that the first 3 decimals coincide. The cubic root of 18404102 is about 264.0208412533.

Adding to 18404102 its reverse (20140481), we get a palindrome (38544583).

The spelling of 18404102 in words is "eighteen million, four hundred four thousand, one hundred two".