20510045431 has 2 divisors, whose sum is σ = 20510045432. Its totient is φ = 20510045430.

The previous prime is 20510045383. The next prime is 20510045447. The reversal of 20510045431 is 13454001502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20510045431 is a prime.

It is a super-2 number, since 2×20510045431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20510045396 and 20510045405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20519045431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255022715 + 10255022716.

It is an arithmetic number, because the mean of its divisors is an integer number (10255022716).

Almost surely, 2^20510045431 is an apocalyptic number.

20510045431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20510045431 is an equidigital number, since it uses as much as digits as its factorization.

20510045431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20510045431 its reverse (13454001502), we get a palindrome (33964046933).

The spelling of 20510045431 in words is "twenty billion, five hundred ten million, forty-five thousand, four hundred thirty-one".