18235806622644 has 192 divisors, whose sum is σ = 48260396878848. Its totient is φ = 5321499724800.

The previous prime is 18235806622633. The next prime is 18235806622699. The reversal of 18235806622644 is 44622660853281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57873787 + ... + 58188029.

It is an arithmetic number, because the mean of its divisors is an integer number (251356233744).

Almost surely, 2^{18235806622644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18235806622644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24130198439424).

18235806622644 is an abundant number, since it is smaller than the sum of its proper divisors (30024590256204).

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

18235806622644 is a wasteful number, since it uses less digits than its factorization.

18235806622644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314558 (or 314556 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 57.

The spelling of 18235806622644 in words is "eighteen trillion, two hundred thirty-five billion, eight hundred six million, six hundred twenty-two thousand, six hundred forty-four".