20709001178982 has 48 divisors (see below), whose sum is σ = 46542235364352. Its totient is φ = 6901383452040.

The previous prime is 20709001178977. The next prime is 20709001179001. The reversal of 20709001178982 is 28987110090702.

It is a super-3 number, since 3×20709001178982³ (a number of 41 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2912718 + ... + 7064129.

It is an arithmetic number, because the mean of its divisors is an integer number (969629903424).

Almost surely, 2^{20709001178982} is an apocalyptic number.

20709001178982 is an abundant number, since it is smaller than the sum of its proper divisors (25833234185370).

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

20709001178982 is an equidigital number, since it uses as much as digits as its factorization.

20709001178982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981135 (or 9981123 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 20709001178982 in words is "twenty trillion, seven hundred nine billion, one million, one hundred seventy-eight thousand, nine hundred eighty-two".