20504202523 has 8 divisors (see below), whose sum is σ = 23439237120. Its totient is φ = 17570633640.

The previous prime is 20504202391. The next prime is 20504202529. The reversal of 20504202523 is 32520240502.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20504202523 is a prime.

It is a super-2 number, since 2×20504202523² (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 (20504202529) 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, 336283 + ... + 392548.

It is an arithmetic number, because the mean of its divisors is an integer number (2929904640).

Almost surely, 2^20504202523 is an apocalyptic number.

20504202523 is a deficient number, since it is larger than the sum of its proper divisors (2935034597).

20504202523 is an equidigital number, since it uses as much as digits as its factorization.

20504202523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732857.

The product of its (nonzero) digits is 4800, while the sum is 25.

The spelling of 20504202523 in words is "twenty billion, five hundred four million, two hundred two thousand, five hundred twenty-three".