20027850779 has 4 divisors (see below), whose sum is σ = 20044527960. Its totient is φ = 20011173600.

The previous prime is 20027850769. The next prime is 20027850797. The reversal of 20027850779 is 97705872002.

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 20027850779 - 2²⁸ = 19759415323 is a prime.

It is a super-2 number, since 2×20027850779² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20027850769) 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 in 3 ways as a sum of consecutive naturals, for example, 8336789 + ... + 8339190.

It is an arithmetic number, because the mean of its divisors is an integer number (5011131990).

Almost surely, 2^20027850779 is an apocalyptic number.

20027850779 is a deficient number, since it is larger than the sum of its proper divisors (16677181).

20027850779 is a wasteful number, since it uses less digits than its factorization.

20027850779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16677180.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 20027850779 in words is "twenty billion, twenty-seven million, eight hundred fifty thousand, seven hundred seventy-nine".