18402004004 has 12 divisors (see below), whose sum is σ = 32210069724. Its totient is φ = 9199126944.

The previous prime is 18402004001. The next prime is 18402004037. The reversal of 18402004004 is 40040020481.

It can be written as a sum of positive squares in 2 ways, for example, as 3784710400 + 14617293604 = 61520^2 + 120902^2 .

It is not an unprimeable number, because it can be changed into a prime (18402004001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446567 + ... + 486030.

It is an arithmetic number, because the mean of its divisors is an integer number (2684172477).

Almost surely, 2^18402004004 is an apocalyptic number.

It is an amenable number.

18402004004 is a deficient number, since it is larger than the sum of its proper divisors (13808065720).

18402004004 is a wasteful number, since it uses less digits than its factorization.

18402004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937534 (or 937532 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 18402004004 its reverse (40040020481), we get a palindrome (58442024485).

The spelling of 18402004004 in words is "eighteen billion, four hundred two million, four thousand, four".