18502198708 has 216 divisors, whose sum is σ = 42030213120. Its totient is φ = 7094666880.

The previous prime is 18502198669. The next prime is 18502198733. The reversal of 18502198708 is 80789120581.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 145686541 + ... + 145686667.

It is an arithmetic number, because the mean of its divisors is an integer number (194584320).

Almost surely, 2^18502198708 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 18502198708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21015106560).

18502198708 is an abundant number, since it is smaller than the sum of its proper divisors (23528014412).

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

18502198708 is a wasteful number, since it uses less digits than its factorization.

18502198708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 49.

The spelling of 18502198708 in words is "eighteen billion, five hundred two million, one hundred ninety-eight thousand, seven hundred eight".