20317356123 has 8 divisors (see below), whose sum is σ = 28023939600. Its totient is φ = 13077838368.

The previous prime is 20317356119. The next prime is 20317356161. The reversal of 20317356123 is 32165371302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20317356123 - 2² = 20317356119 is a prime.

It is a super-2 number, since 2×20317356123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20317356173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116766328 + ... + 116766501.

It is an arithmetic number, because the mean of its divisors is an integer number (3502992450).

Almost surely, 2^20317356123 is an apocalyptic number.

20317356123 is a deficient number, since it is larger than the sum of its proper divisors (7706583477).

20317356123 is a wasteful number, since it uses less digits than its factorization.

20317356123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233532861.

The product of its (nonzero) digits is 22680, while the sum is 33.

The spelling of 20317356123 in words is "twenty billion, three hundred seventeen million, three hundred fifty-six thousand, one hundred twenty-three".