18442609684394 has 16 divisors (see below), whose sum is σ = 31615997294400. Its totient is φ = 7903951834464.

The previous prime is 18442609684363. The next prime is 18442609684399. The reversal of 18442609684394 is 49348690624481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18442609684399) 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, 3341177 + ... + 6931715.

It is an arithmetic number, because the mean of its divisors is an integer number (1975999830900).

Almost surely, 2^{18442609684394} is an apocalyptic number.

18442609684394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18442609684394 is a deficient number, since it is larger than the sum of its proper divisors (13173387610006).

18442609684394 is a wasteful number, since it uses less digits than its factorization.

18442609684394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957437.

The product of its (nonzero) digits is 286654464, while the sum is 68.

The spelling of 18442609684394 in words is "eighteen trillion, four hundred forty-two billion, six hundred nine million, six hundred eighty-four thousand, three hundred ninety-four".