20311312293 has 12 divisors (see below), whose sum is σ = 29345217408. Its totient is φ = 13537803240.

The previous prime is 20311312261. The next prime is 20311312297. The reversal of 20311312293 is 39221311302.

It is not a de Polignac number, because 20311312293 - 2⁵ = 20311312261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311312297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213723 + ... + 293768.

It is an arithmetic number, because the mean of its divisors is an integer number (2445434784).

Almost surely, 2^20311312293 is an apocalyptic number.

It is an amenable number.

20311312293 is a deficient number, since it is larger than the sum of its proper divisors (9033905115).

20311312293 is a wasteful number, since it uses less digits than its factorization.

20311312293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511944 (or 511941 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 20311312293 its reverse (39221311302), we get a palindrome (59532623595).

The spelling of 20311312293 in words is "twenty billion, three hundred eleven million, three hundred twelve thousand, two hundred ninety-three".