21794250793455 has 48 divisors (see below), whose sum is σ = 43905125122560. Its totient is φ = 9794220202944.

The previous prime is 21794250793453. The next prime is 21794250793489. The reversal of 21794250793455 is 55439705249712.

21794250793455 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 42 + 50 + 7 + 93 + 455 = 666.

It is not a de Polignac number, because 21794250793455 - 2¹ = 21794250793453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 21794250793392 and 21794250793401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794250793453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 586321227 + ... + 586358396.

It is an arithmetic number, because the mean of its divisors is an integer number (914690106720).

Almost surely, 2^{21794250793455} is an apocalyptic number.

21794250793455 is an abundant number, since it is smaller than the sum of its proper divisors (22110874329105).

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

21794250793455 is a wasteful number, since it uses less digits than its factorization.

21794250793455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172679700 (or 1172679697 counting only the distinct ones).

The product of its (nonzero) digits is 95256000, while the sum is 63.

The spelling of 21794250793455 in words is "twenty-one trillion, seven hundred ninety-four billion, two hundred fifty million, seven hundred ninety-three thousand, four hundred fifty-five".