20027840579 has 2 divisors, whose sum is σ = 20027840580. Its totient is φ = 20027840578.

The previous prime is 20027840561. The next prime is 20027840603. The reversal of 20027840579 is 97504872002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20027840579 is a prime.

It is a super-2 number, since 2×20027840579² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20027840509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013920289 + 10013920290.

It is an arithmetic number, because the mean of its divisors is an integer number (10013920290).

Almost surely, 2^20027840579 is an apocalyptic number.

20027840579 is a deficient number, since it is larger than the sum of its proper divisors (1).

20027840579 is an equidigital number, since it uses as much as digits as its factorization.

20027840579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 20027840579 in words is "twenty billion, twenty-seven million, eight hundred forty thousand, five hundred seventy-nine".