20345125523 has 8 divisors (see below), whose sum is σ = 20475260928. Its totient is φ = 20215055304.

The previous prime is 20345125519. The next prime is 20345125531. The reversal of 20345125523 is 32552154302.

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

It is a cyclic number.

It is not a de Polignac number, because 20345125523 - 2² = 20345125519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20345125523.

It is not an unprimeable number, because it can be changed into a prime (20345125123) 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, 713486 + ... + 741452.

It is an arithmetic number, because the mean of its divisors is an integer number (2559407616).

Almost surely, 2^20345125523 is an apocalyptic number.

20345125523 is a deficient number, since it is larger than the sum of its proper divisors (130135405).

20345125523 is a wasteful number, since it uses less digits than its factorization.

20345125523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32593.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 20345125523 its reverse (32552154302), we get a palindrome (52897279825).

The spelling of 20345125523 in words is "twenty billion, three hundred forty-five million, one hundred twenty-five thousand, five hundred twenty-three".