20535450523 has 6 divisors (see below), whose sum is σ = 23888177196. Its totient is φ = 17601814692.

The previous prime is 20535450521. The next prime is 20535450541. The reversal of 20535450523 is 32505453502.

It is not a de Polignac number, because 20535450523 - 2¹ = 20535450521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535450521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209545365 + ... + 209545462.

It is an arithmetic number, because the mean of its divisors is an integer number (3981362866).

Almost surely, 2^20535450523 is an apocalyptic number.

20535450523 is a deficient number, since it is larger than the sum of its proper divisors (3352726673).

20535450523 is an equidigital number, since it uses as much as digits as its factorization.

20535450523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419090841 (or 419090834 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 34.

The spelling of 20535450523 in words is "twenty billion, five hundred thirty-five million, four hundred fifty thousand, five hundred twenty-three".