20311063775 has 12 divisors (see below), whose sum is σ = 25258311192. Its totient is φ = 16202017440.

The previous prime is 20311063733. The next prime is 20311063777. The reversal of 20311063775 is 57736011302.

It is not a de Polignac number, because 20311063775 - 2⁸ = 20311063519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311063777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161992 + ... + 1179341.

It is an arithmetic number, because the mean of its divisors is an integer number (2104859266).

Almost surely, 2^20311063775 is an apocalyptic number.

20311063775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20311063775 is a deficient number, since it is larger than the sum of its proper divisors (4947247417).

20311063775 is a wasteful number, since it uses less digits than its factorization.

20311063775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341690 (or 2341685 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 20311063775 in words is "twenty billion, three hundred eleven million, sixty-three thousand, seven hundred seventy-five".