20535234523 has 16 divisors (see below), whose sum is σ = 21885177600. Its totient is φ = 19213368480.

The previous prime is 20535234481. The next prime is 20535234563. The reversal of 20535234523 is 32543253502.

It is a happy number.

It is not a de Polignac number, because 20535234523 - 2⁹ = 20535234011 is a prime.

It is a super-2 number, since 2×20535234523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535234563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628140 + ... + 660022.

It is an arithmetic number, because the mean of its divisors is an integer number (1367823600).

Almost surely, 2^20535234523 is an apocalyptic number.

20535234523 is a deficient number, since it is larger than the sum of its proper divisors (1349943077).

20535234523 is a wasteful number, since it uses less digits than its factorization.

20535234523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32322.

The product of its (nonzero) digits is 108000, while the sum is 34.

The spelling of 20535234523 in words is "twenty billion, five hundred thirty-five million, two hundred thirty-four thousand, five hundred twenty-three".