21273025018080 has 384 divisors, whose sum is σ = 74062076046336. Its totient is φ = 5089683456000.

The previous prime is 21273025018031. The next prime is 21273025018139. The reversal of 21273025018080 is 8081052037212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166852917 + ... + 166980363.

It is an arithmetic number, because the mean of its divisors is an integer number (192869989704).

Almost surely, 2^{21273025018080} is an apocalyptic number.

21273025018080 is a gapful number since it is divisible by the number (20) 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 21273025018080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37031038023168).

21273025018080 is an abundant number, since it is smaller than the sum of its proper divisors (52789051028256).

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

21273025018080 is a wasteful number, since it uses less digits than its factorization.

21273025018080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127890 (or 127882 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 21273025018080 in words is "twenty-one trillion, two hundred seventy-three billion, twenty-five million, eighteen thousand, eighty".