18026802097920 has 2160 divisors, whose sum is σ = 81699451029504. Its totient is φ = 3714862694400.

The previous prime is 18026802097903. The next prime is 18026802097921. The reversal of 18026802097920 is 2979020862081.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026802097921) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 11504020977 + ... + 11504022543.

Almost surely, 2^{18026802097920} is an apocalyptic number.

18026802097920 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 18026802097920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40849725514752).

18026802097920 is an abundant number, since it is smaller than the sum of its proper divisors (63672648931584).

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

18026802097920 is a wasteful number, since it uses less digits than its factorization.

18026802097920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 18026802097920 in words is "eighteen trillion, twenty-six billion, eight hundred two million, ninety-seven thousand, nine hundred twenty".