20085379771 has 2 divisors, whose sum is σ = 20085379772. Its totient is φ = 20085379770.

The previous prime is 20085379757. The next prime is 20085379799. The reversal of 20085379771 is 17797358002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20085379771 - 2¹⁵ = 20085347003 is a prime.

It is a super-3 number, since 3×20085379771³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20085379711) 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 as a sum of consecutive naturals, namely, 10042689885 + 10042689886.

It is an arithmetic number, because the mean of its divisors is an integer number (10042689886).

Almost surely, 2^20085379771 is an apocalyptic number.

20085379771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085379771 is an equidigital number, since it uses as much as digits as its factorization.

20085379771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 20085379771 in words is "twenty billion, eighty-five million, three hundred seventy-nine thousand, seven hundred seventy-one".