20473536533 has 4 divisors (see below), whose sum is σ = 20476777740. Its totient is φ = 20470295328.

The previous prime is 20473536527. The next prime is 20473536607. The reversal of 20473536533 is 33563537402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9868038244 + 10605498289 = 99338^2 + 102983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20473536533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473536833) 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, 1611110 + ... + 1623767.

It is an arithmetic number, because the mean of its divisors is an integer number (5119194435).

Almost surely, 2^20473536533 is an apocalyptic number.

It is an amenable number.

20473536533 is a deficient number, since it is larger than the sum of its proper divisors (3241207).

20473536533 is an equidigital number, since it uses as much as digits as its factorization.

20473536533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241206.

The product of its (nonzero) digits is 680400, while the sum is 41.

The spelling of 20473536533 in words is "twenty billion, four hundred seventy-three million, five hundred thirty-six thousand, five hundred thirty-three".