18420432134 has 8 divisors (see below), whose sum is σ = 29756082720. Its totient is φ = 8501737896.

The previous prime is 18420432103. The next prime is 18420432169. The reversal of 18420432134 is 43123402481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18420432134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354239054 + ... + 354239105.

It is an arithmetic number, because the mean of its divisors is an integer number (3719510340).

Almost surely, 2^18420432134 is an apocalyptic number.

18420432134 is a deficient number, since it is larger than the sum of its proper divisors (11335650586).

18420432134 is a wasteful number, since it uses less digits than its factorization.

18420432134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708478174.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 18420432134 in words is "eighteen billion, four hundred twenty million, four hundred thirty-two thousand, one hundred thirty-four".