21797798803182 has 36 divisors (see below), whose sum is σ = 47691545984784. Its totient is φ = 7195389833160.

The previous prime is 21797798803163. The next prime is 21797798803189. The reversal of 21797798803182 is 28130889779712.

21797798803182 is a `hidden beast` number, since 217 + 9 + 7 + 7 + 98 + 8 + 0 + 318 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21797798803182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21797798803189) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56882694 + ... + 57264617.

It is an arithmetic number, because the mean of its divisors is an integer number (1324765166244).

Almost surely, 2^{21797798803182} is an apocalyptic number.

21797798803182 is an abundant number, since it is smaller than the sum of its proper divisors (25893747181602).

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

21797798803182 is a wasteful number, since it uses less digits than its factorization.

21797798803182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114147525 (or 114147419 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 72.

The spelling of 21797798803182 in words is "twenty-one trillion, seven hundred ninety-seven billion, seven hundred ninety-eight million, eight hundred three thousand, one hundred eighty-two".