18434368456 has 16 divisors (see below), whose sum is σ = 39502218240. Its totient is φ = 7900443600.

The previous prime is 18434368441. The next prime is 18434368481. The reversal of 18434368456 is 65486343481.

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, 164592520 + ... + 164592631.

It is an arithmetic number, because the mean of its divisors is an integer number (2468888640).

Almost surely, 2^18434368456 is an apocalyptic number.

It is an amenable number.

18434368456 is an abundant number, since it is smaller than the sum of its proper divisors (21067849784).

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

18434368456 is a wasteful number, since it uses less digits than its factorization.

18434368456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329185164 (or 329185160 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 52.

The spelling of 18434368456 in words is "eighteen billion, four hundred thirty-four million, three hundred sixty-eight thousand, four hundred fifty-six".