20545425331 has 2 divisors, whose sum is σ = 20545425332. Its totient is φ = 20545425330.

The previous prime is 20545425247. The next prime is 20545425337. The reversal of 20545425331 is 13352454502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20545425331 - 2⁹ = 20545424819 is a prime.

It is a super-2 number, since 2×20545425331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20545425337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272712665 + 10272712666.

It is an arithmetic number, because the mean of its divisors is an integer number (10272712666).

Almost surely, 2^20545425331 is an apocalyptic number.

20545425331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545425331 is an equidigital number, since it uses as much as digits as its factorization.

20545425331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20545425331 its reverse (13352454502), we get a palindrome (33897879833).

The spelling of 20545425331 in words is "twenty billion, five hundred forty-five million, four hundred twenty-five thousand, three hundred thirty-one".