20533122523 has 4 divisors (see below), whose sum is σ = 20814398248. Its totient is φ = 20251846800.

The previous prime is 20533122517. The next prime is 20533122541. The reversal of 20533122523 is 32522133502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20533122523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20533122491 and 20533122500.

It is not an unprimeable number, because it can be changed into a prime (20533122553) 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, 140637753 + ... + 140637898.

It is an arithmetic number, because the mean of its divisors is an integer number (5203599562).

Almost surely, 2^20533122523 is an apocalyptic number.

20533122523 is a deficient number, since it is larger than the sum of its proper divisors (281275725).

20533122523 is an equidigital number, since it uses as much as digits as its factorization.

20533122523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281275724.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 20533122523 in words is "twenty billion, five hundred thirty-three million, one hundred twenty-two thousand, five hundred twenty-three".