18434237204 has 6 divisors (see below), whose sum is σ = 32259915114. Its totient is φ = 9217118600.

The previous prime is 18434237201. The next prime is 18434237257. The reversal of 18434237204 is 40273243481.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17145283600 + 1288953604 = 130940^2 + 35902^2 .

It is a super-2 number, since 2×18434237204² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434237201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304279647 + ... + 2304279654.

It is an arithmetic number, because the mean of its divisors is an integer number (5376652519).

Almost surely, 2^18434237204 is an apocalyptic number.

It is an amenable number.

18434237204 is a deficient number, since it is larger than the sum of its proper divisors (13825677910).

18434237204 is a wasteful number, since it uses less digits than its factorization.

18434237204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608559305 (or 4608559303 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 18434237204 in words is "eighteen billion, four hundred thirty-four million, two hundred thirty-seven thousand, two hundred four".