20123111295 has 24 divisors (see below), whose sum is σ = 39862925856. Its totient is φ = 9199136448.

The previous prime is 20123111279. The next prime is 20123111317. The reversal of 20123111295 is 59211132102.

It is not a de Polignac number, because 20123111295 - 2⁴ = 20123111279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31941132 + ... + 31941761.

It is an arithmetic number, because the mean of its divisors is an integer number (1660955244).

Almost surely, 2^20123111295 is an apocalyptic number.

20123111295 is a deficient number, since it is larger than the sum of its proper divisors (19739814561).

20123111295 is a wasteful number, since it uses less digits than its factorization.

20123111295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63882911 (or 63882908 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 20123111295 its reverse (59211132102), we get a palindrome (79334243397).

The spelling of 20123111295 in words is "twenty billion, one hundred twenty-three million, one hundred eleven thousand, two hundred ninety-five".