19711103623 has 2 divisors, whose sum is σ = 19711103624. Its totient is φ = 19711103622.

The previous prime is 19711103609. The next prime is 19711103627. The reversal of 19711103623 is 32630111791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19711103623 - 2⁵ = 19711103591 is a prime.

It is a super-2 number, since 2×19711103623² (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 (19711103627) 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, 9855551811 + 9855551812.

It is an arithmetic number, because the mean of its divisors is an integer number (9855551812).

Almost surely, 2^19711103623 is an apocalyptic number.

19711103623 is a deficient number, since it is larger than the sum of its proper divisors (1).

19711103623 is an equidigital number, since it uses as much as digits as its factorization.

19711103623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The spelling of 19711103623 in words is "nineteen billion, seven hundred eleven million, one hundred three thousand, six hundred twenty-three".