20380476771 has 16 divisors (see below), whose sum is σ = 30196847520. Its totient is φ = 13585387680.

The previous prime is 20380476763. The next prime is 20380476791. The reversal of 20380476771 is 17767408302.

It is not a de Polignac number, because 20380476771 - 2³ = 20380476763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20380476791) 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 15 ways as a sum of consecutive naturals, for example, 217801 + ... + 296981.

It is an arithmetic number, because the mean of its divisors is an integer number (1887302970).

Almost surely, 2^20380476771 is an apocalyptic number.

20380476771 is a deficient number, since it is larger than the sum of its proper divisors (9816370749).

20380476771 is an equidigital number, since it uses as much as digits as its factorization.

20380476771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88723 (or 88717 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 20380476771 in words is "twenty billion, three hundred eighty million, four hundred seventy-six thousand, seven hundred seventy-one".