18402220204 has 12 divisors (see below), whose sum is σ = 32204854528. Its totient is φ = 9200833200.

The previous prime is 18402220189. The next prime is 18402220219. The reversal of 18402220204 is 40202220481.

It is an interprime number because it is at equal distance from previous prime (18402220189) and next prime (18402220219).

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, 179989 + ... + 263059.

Almost surely, 2^18402220204 is an apocalyptic number.

It is an amenable number.

18402220204 is a deficient number, since it is larger than the sum of its proper divisors (13802634324).

18402220204 is a wasteful number, since it uses less digits than its factorization.

18402220204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138456 (or 138454 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 18402220204 its reverse (40202220481), we get a palindrome (58604440685).

The spelling of 18402220204 in words is "eighteen billion, four hundred two million, two hundred twenty thousand, two hundred four".