20983748127 has 4 divisors (see below), whose sum is σ = 27978330840. Its totient is φ = 13989165416.

The previous prime is 20983748117. The next prime is 20983748129. The reversal of 20983748127 is 72184738902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20983748127 - 2⁷ = 20983747999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20983748127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20983748129) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3497291352 + ... + 3497291357.

It is an arithmetic number, because the mean of its divisors is an integer number (6994582710).

Almost surely, 2^20983748127 is an apocalyptic number.

20983748127 is a deficient number, since it is larger than the sum of its proper divisors (6994582713).

20983748127 is an equidigital number, since it uses as much as digits as its factorization.

20983748127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994582712.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 20983748127 in words is "twenty billion, nine hundred eighty-three million, seven hundred forty-eight thousand, one hundred twenty-seven".