21190042603 has 2 divisors, whose sum is σ = 21190042604. Its totient is φ = 21190042602.

The previous prime is 21190042597. The next prime is 21190042639. The reversal of 21190042603 is 30624009112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21190042603 - 2⁵ = 21190042571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21190042403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10595021301 + 10595021302.

It is an arithmetic number, because the mean of its divisors is an integer number (10595021302).

Almost surely, 2^21190042603 is an apocalyptic number.

21190042603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21190042603 is an equidigital number, since it uses as much as digits as its factorization.

21190042603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 21190042603 in words is "twenty-one billion, one hundred ninety million, forty-two thousand, six hundred three".