18434431896 has 32 divisors (see below), whose sum is σ = 46168853040. Its totient is φ = 6133774208.

The previous prime is 18434431891. The next prime is 18434431937. The reversal of 18434431896 is 69813443481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434431891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676131 + ... + 702866.

Almost surely, 2^18434431896 is an apocalyptic number.

It is an amenable number.

18434431896 is an abundant number, since it is smaller than the sum of its proper divisors (27734421144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18434431896 is a wasteful number, since it uses less digits than its factorization.

18434431896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379563 (or 1379559 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The spelling of 18434431896 in words is "eighteen billion, four hundred thirty-four million, four hundred thirty-one thousand, eight hundred ninety-six".