20531022539 has 2 divisors, whose sum is σ = 20531022540. Its totient is φ = 20531022538.

The previous prime is 20531022529. The next prime is 20531022541. The reversal of 20531022539 is 93522013502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20531022539 - 2⁸ = 20531022283 is a prime.

Together with 20531022541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20531022529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265511269 + 10265511270.

It is an arithmetic number, because the mean of its divisors is an integer number (10265511270).

Almost surely, 2^20531022539 is an apocalyptic number.

20531022539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20531022539 is an equidigital number, since it uses as much as digits as its factorization.

20531022539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 20531022539 in words is "twenty billion, five hundred thirty-one million, twenty-two thousand, five hundred thirty-nine".