21087546080373 has 32 divisors (see below), whose sum is σ = 31771054515200. Its totient is φ = 13821717454128.

The previous prime is 21087546080371. The next prime is 21087546080389. The reversal of 21087546080373 is 37308064578012.

It is a happy number.

21087546080373 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 75 + 460 + 80 + 37 + 3 = 666.

It is not a de Polignac number, because 21087546080373 - 2¹ = 21087546080371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21087546080371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26889415 + ... + 27662532.

It is an arithmetic number, because the mean of its divisors is an integer number (992845453600).

Almost surely, 2^{21087546080373} is an apocalyptic number.

It is an amenable number.

21087546080373 is a deficient number, since it is larger than the sum of its proper divisors (10683508434827).

21087546080373 is a wasteful number, since it uses less digits than its factorization.

21087546080373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54552198 (or 54552192 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 21087546080373 in words is "twenty-one trillion, eighty-seven billion, five hundred forty-six million, eighty thousand, three hundred seventy-three".