20315277123 has 4 divisors (see below), whose sum is σ = 27087036168. Its totient is φ = 13543518080.

The previous prime is 20315277107. The next prime is 20315277127. The reversal of 20315277123 is 32177251302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20315277123 - 2⁴ = 20315277107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20315277127) 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 3 ways as a sum of consecutive naturals, for example, 3385879518 + ... + 3385879523.

It is an arithmetic number, because the mean of its divisors is an integer number (6771759042).

Almost surely, 2^20315277123 is an apocalyptic number.

20315277123 is a deficient number, since it is larger than the sum of its proper divisors (6771759045).

20315277123 is an equidigital number, since it uses as much as digits as its factorization.

20315277123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771759044.

The product of its (nonzero) digits is 17640, while the sum is 33.

The spelling of 20315277123 in words is "twenty billion, three hundred fifteen million, two hundred seventy-seven thousand, one hundred twenty-three".