20345031236423 has 4 divisors (see below), whose sum is σ = 21541797779760. Its totient is φ = 19148264693088.

The previous prime is 20345031236317. The next prime is 20345031236437. The reversal of 20345031236423 is 32463213054302.

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 20345031236423 - 2²⁴ = 20345014459207 is a prime.

It is a super-2 number, since 2×20345031236423² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345031236923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598383271643 + ... + 598383271676.

It is an arithmetic number, because the mean of its divisors is an integer number (5385449444940).

Almost surely, 2^{20345031236423} is an apocalyptic number.

20345031236423 is a deficient number, since it is larger than the sum of its proper divisors (1196766543337).

20345031236423 is a wasteful number, since it uses less digits than its factorization.

20345031236423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196766543336.

The product of its (nonzero) digits is 311040, while the sum is 38.

The spelling of 20345031236423 in words is "twenty trillion, three hundred forty-five billion, thirty-one million, two hundred thirty-six thousand, four hundred twenty-three".