20531022533 has 4 divisors (see below), whose sum is σ = 23464025760. Its totient is φ = 17598019308.

The previous prime is 20531022529. The next prime is 20531022539. The reversal of 20531022533 is 33522013502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20531022533 - 2² = 20531022529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531022539) 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, 1466501603 + ... + 1466501616.

It is an arithmetic number, because the mean of its divisors is an integer number (5866006440).

Almost surely, 2^20531022533 is an apocalyptic number.

It is an amenable number.

20531022533 is a deficient number, since it is larger than the sum of its proper divisors (2933003227).

20531022533 is an equidigital number, since it uses as much as digits as its factorization.

20531022533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933003226.

The product of its (nonzero) digits is 5400, while the sum is 26.

The spelling of 20531022533 in words is "twenty billion, five hundred thirty-one million, twenty-two thousand, five hundred thirty-three".