18955484829798 has 64 divisors (see below), whose sum is σ = 42145034344704. Its totient is φ = 5634733104000.

The previous prime is 18955484829791. The next prime is 18955484829863. The reversal of 18955484829798 is 89792848455981.

It is a happy number.

It is a super-2 number, since 2×18955484829798² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955484829791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19896393 + ... + 20827323.

It is an arithmetic number, because the mean of its divisors is an integer number (658516161636).

Almost surely, 2^{18955484829798} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18955484829798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21072517172352).

18955484829798 is an abundant number, since it is smaller than the sum of its proper divisors (23189549514906).

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

18955484829798 is a wasteful number, since it uses less digits than its factorization.

18955484829798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936821.

The product of its digits is 16721510400, while the sum is 87.

The spelling of 18955484829798 in words is "eighteen trillion, nine hundred fifty-five billion, four hundred eighty-four million, eight hundred twenty-nine thousand, seven hundred ninety-eight".