20084177920921 has 8 divisors (see below), whose sum is σ = 20101252143200. Its totient is φ = 20067108233760.

The previous prime is 20084177920907. The next prime is 20084177920949. The reversal of 20084177920921 is 12902977148002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20084177920921 - 2²¹ = 20084175823769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20084177920981) 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 7 ways as a sum of consecutive naturals, for example, 7756765 + ... + 10016773.

It is an arithmetic number, because the mean of its divisors is an integer number (2512656517900).

Almost surely, 2^{20084177920921} is an apocalyptic number.

It is an amenable number.

20084177920921 is a deficient number, since it is larger than the sum of its proper divisors (17074222279).

20084177920921 is a wasteful number, since it uses less digits than its factorization.

20084177920921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267559.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 20084177920921 in words is "twenty trillion, eighty-four billion, one hundred seventy-seven million, nine hundred twenty thousand, nine hundred twenty-one".