20312523503 has 2 divisors, whose sum is σ = 20312523504. Its totient is φ = 20312523502.

The previous prime is 20312523493. The next prime is 20312523509. The reversal of 20312523503 is 30532521302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312523503 - 2⁴ = 20312523487 is a prime.

It is a super-2 number, since 2×20312523503² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312523509) 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, 10156261751 + 10156261752.

It is an arithmetic number, because the mean of its divisors is an integer number (10156261752).

Almost surely, 2^20312523503 is an apocalyptic number.

20312523503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312523503 is an equidigital number, since it uses as much as digits as its factorization.

20312523503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The spelling of 20312523503 in words is "twenty billion, three hundred twelve million, five hundred twenty-three thousand, five hundred three".