20512326733 has 4 divisors (see below), whose sum is σ = 21066713980. Its totient is φ = 19957939488.

The previous prime is 20512326727. The next prime is 20512326797. The reversal of 20512326733 is 33762321502.

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 8024934724 + 12487392009 = 89582^2 + 111747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20512326733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512326433) 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, 277193568 + ... + 277193641.

It is an arithmetic number, because the mean of its divisors is an integer number (5266678495).

Almost surely, 2^20512326733 is an apocalyptic number.

It is an amenable number.

20512326733 is a deficient number, since it is larger than the sum of its proper divisors (554387247).

20512326733 is an equidigital number, since it uses as much as digits as its factorization.

20512326733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554387246.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 20512326733 in words is "twenty billion, five hundred twelve million, three hundred twenty-six thousand, seven hundred thirty-three".