18949173253000 has 128 divisors (see below), whose sum is σ = 45338561049600. Its totient is φ = 7409542368000.

The previous prime is 18949173252979. The next prime is 18949173253039. The reversal of 18949173253000 is 35237194981.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39192730 + ... + 39673270.

It is an arithmetic number, because the mean of its divisors is an integer number (354207508200).

Almost surely, 2^{18949173253000} is an apocalyptic number.

18949173253000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949173253000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22669280524800).

18949173253000 is an abundant number, since it is smaller than the sum of its proper divisors (26389387796600).

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

18949173253000 is a wasteful number, since it uses less digits than its factorization.

18949173253000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481448 (or 481434 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 18949173253000 in words is "eighteen trillion, nine hundred forty-nine billion, one hundred seventy-three million, two hundred fifty-three thousand".