20632756531 has 2 divisors, whose sum is σ = 20632756532. Its totient is φ = 20632756530.

The previous prime is 20632756511. The next prime is 20632756577. The reversal of 20632756531 is 13565723602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20632756531 - 2¹⁷ = 20632625459 is a prime.

It is a super-2 number, since 2×20632756531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20632756511) 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 as a sum of consecutive naturals, namely, 10316378265 + 10316378266.

It is an arithmetic number, because the mean of its divisors is an integer number (10316378266).

Almost surely, 2^20632756531 is an apocalyptic number.

20632756531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632756531 is an equidigital number, since it uses as much as digits as its factorization.

20632756531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 20632756531 in words is "twenty billion, six hundred thirty-two million, seven hundred fifty-six thousand, five hundred thirty-one".