20531485019 has 2 divisors, whose sum is σ = 20531485020. Its totient is φ = 20531485018.

The previous prime is 20531485001. The next prime is 20531485057. The reversal of 20531485019 is 91058413502.

It is a happy number.

It is an a-pointer prime, because the next prime (20531485057) can be obtained adding 20531485019 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20531485019 - 2⁸ = 20531484763 is a prime.

It is a super-2 number, since 2×20531485019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20531485069) 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, 10265742509 + 10265742510.

It is an arithmetic number, because the mean of its divisors is an integer number (10265742510).

Almost surely, 2^20531485019 is an apocalyptic number.

20531485019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20531485019 is an equidigital number, since it uses as much as digits as its factorization.

20531485019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 20531485019 in words is "twenty billion, five hundred thirty-one million, four hundred eighty-five thousand, nineteen".