18197928288870 has 128 divisors (see below), whose sum is σ = 47947273920000. Its totient is φ = 4383714816000.

The previous prime is 18197928288823. The next prime is 18197928288887. The reversal of 18197928288870 is 7888282979181.

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, 74480805 + ... + 74724735.

It is an arithmetic number, because the mean of its divisors is an integer number (374588077500).

Almost surely, 2^{18197928288870} is an apocalyptic number.

18197928288870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18197928288870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23973636960000).

18197928288870 is an abundant number, since it is smaller than the sum of its proper divisors (29749345631130).

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

18197928288870 is a wasteful number, since it uses less digits than its factorization.

18197928288870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245382.

The product of its (nonzero) digits is 520224768, while the sum is 78.

The spelling of 18197928288870 in words is "eighteen trillion, one hundred ninety-seven billion, nine hundred twenty-eight million, two hundred eighty-eight thousand, eight hundred seventy".