12638220403 has 2 divisors, whose sum is σ = 12638220404. Its totient is φ = 12638220402.

The previous prime is 12638220373. The next prime is 12638220421. The reversal of 12638220403 is 30402283621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12638220403 - 2³³ = 4048285811 is a prime.

It is a super-2 number, since 2×12638220403² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12638220433) 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, 6319110201 + 6319110202.

It is an arithmetic number, because the mean of its divisors is an integer number (6319110202).

Almost surely, 2^12638220403 is an apocalyptic number.

12638220403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638220403 is an equidigital number, since it uses as much as digits as its factorization.

12638220403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 12638220403 in words is "twelve billion, six hundred thirty-eight million, two hundred twenty thousand, four hundred three".