20054327981 has 8 divisors (see below), whose sum is σ = 20183217600. Its totient is φ = 19925510112.

The previous prime is 20054327957. The next prime is 20054327989. The reversal of 20054327981 is 18972345002.

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 20054327981 - 2²⁶ = 19987219117 is a prime.

It is a super-2 number, since 2×20054327981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054327989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613745 + ... + 645593.

It is an arithmetic number, because the mean of its divisors is an integer number (2522902200).

Almost surely, 2^20054327981 is an apocalyptic number.

It is an amenable number.

20054327981 is a deficient number, since it is larger than the sum of its proper divisors (128889619).

20054327981 is a wasteful number, since it uses less digits than its factorization.

20054327981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35875.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 20054327981 in words is "twenty billion, fifty-four million, three hundred twenty-seven thousand, nine hundred eighty-one".