20512062433 has 4 divisors (see below), whose sum is σ = 20512514308. Its totient is φ = 20511610560.

The previous prime is 20512062409. The next prime is 20512062451. The reversal of 20512062433 is 33426021502.

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 4982665744 + 15529396689 = 70588^2 + 124617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20512062433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20512065433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149148 + ... + 251533.

It is an arithmetic number, because the mean of its divisors is an integer number (5128128577).

Almost surely, 2^20512062433 is an apocalyptic number.

It is an amenable number.

20512062433 is a deficient number, since it is larger than the sum of its proper divisors (451875).

20512062433 is an equidigital number, since it uses as much as digits as its factorization.

20512062433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451874.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20512062433 its reverse (33426021502), we get a palindrome (53938083935).

The spelling of 20512062433 in words is "twenty billion, five hundred twelve million, sixty-two thousand, four hundred thirty-three".