20012406503 has 2 divisors, whose sum is σ = 20012406504. Its totient is φ = 20012406502.

The previous prime is 20012406439. The next prime is 20012406509. The reversal of 20012406503 is 30560421002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012406503 - 2⁶ = 20012406439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012406509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006203251 + 10006203252.

It is an arithmetic number, because the mean of its divisors is an integer number (10006203252).

Almost surely, 2^20012406503 is an apocalyptic number.

20012406503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012406503 is an equidigital number, since it uses as much as digits as its factorization.

20012406503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20012406503 its reverse (30560421002), we get a palindrome (50572827505).

The spelling of 20012406503 in words is "twenty billion, twelve million, four hundred six thousand, five hundred three".