18434371804 has 12 divisors (see below), whose sum is σ = 34157806704. Its totient is φ = 8674998464.

The previous prime is 18434371799. The next prime is 18434371807. The reversal of 18434371804 is 40817343481.

It is a super-2 number, since 2×18434371804² (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 (18434371807) 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, 135546784 + ... + 135546919.

It is an arithmetic number, because the mean of its divisors is an integer number (2846483892).

Almost surely, 2^18434371804 is an apocalyptic number.

It is an amenable number.

18434371804 is a deficient number, since it is larger than the sum of its proper divisors (15723434900).

18434371804 is a wasteful number, since it uses less digits than its factorization.

18434371804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271093724 (or 271093722 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 18434371804 in words is "eighteen billion, four hundred thirty-four million, three hundred seventy-one thousand, eight hundred four".