19880995903 has 2 divisors, whose sum is σ = 19880995904. Its totient is φ = 19880995902.

The previous prime is 19880995891. The next prime is 19880995913. The reversal of 19880995903 is 30959908891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19880995903 - 2⁹ = 19880995391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19880995913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9940497951 + 9940497952.

It is an arithmetic number, because the mean of its divisors is an integer number (9940497952).

Almost surely, 2^19880995903 is an apocalyptic number.

19880995903 is a deficient number, since it is larger than the sum of its proper divisors (1).

19880995903 is an equidigital number, since it uses as much as digits as its factorization.

19880995903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 61.

The spelling of 19880995903 in words is "nineteen billion, eight hundred eighty million, nine hundred ninety-five thousand, nine hundred three".