18409435674 has 32 divisors (see below), whose sum is σ = 42123234816. Its totient is φ = 5254273200.

The previous prime is 18409435651. The next prime is 18409435739. The reversal of 18409435674 is 47653490481.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191652 + ... + 271199.

It is an arithmetic number, because the mean of its divisors is an integer number (1316351088).

Almost surely, 2^18409435674 is an apocalyptic number.

18409435674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18409435674 is an abundant number, since it is smaller than the sum of its proper divisors (23713799142).

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

18409435674 is a wasteful number, since it uses less digits than its factorization.

18409435674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463810.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 18409435674 in words is "eighteen billion, four hundred nine million, four hundred thirty-five thousand, six hundred seventy-four".