20520050312431 has 2 divisors, whose sum is σ = 20520050312432. Its totient is φ = 20520050312430.

The previous prime is 20520050312407. The next prime is 20520050312521. The reversal of 20520050312431 is 13421305002502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20520050312431 - 2¹³ = 20520050304239 is a prime.

It is a super-2 number, since 2×20520050312431² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20520050312431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20520050312401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260025156215 + 10260025156216.

It is an arithmetic number, because the mean of its divisors is an integer number (10260025156216).

Almost surely, 2^{20520050312431} is an apocalyptic number.

20520050312431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20520050312431 is an equidigital number, since it uses as much as digits as its factorization.

20520050312431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20520050312431 its reverse (13421305002502), we get a palindrome (33941355314933).

The spelling of 20520050312431 in words is "twenty trillion, five hundred twenty billion, fifty million, three hundred twelve thousand, four hundred thirty-one".