18642802134 has 128 divisors (see below), whose sum is σ = 44451348480. Its totient is φ = 5155113600.

The previous prime is 18642802133. The next prime is 18642802141. The reversal of 18642802134 is 43120824681.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18642802092 and 18642802101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642802133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2547709 + ... + 2555015.

It is an arithmetic number, because the mean of its divisors is an integer number (347276160).

Almost surely, 2^18642802134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18642802134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22225674240).

18642802134 is an abundant number, since it is smaller than the sum of its proper divisors (25808546346).

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

18642802134 is a wasteful number, since it uses less digits than its factorization.

18642802134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7426.

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 18642802134 in words is "eighteen billion, six hundred forty-two million, eight hundred two thousand, one hundred thirty-four".