19946190023 has 2 divisors, whose sum is σ = 19946190024. Its totient is φ = 19946190022.

The previous prime is 19946190013. The next prime is 19946190031. The reversal of 19946190023 is 32009164991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19946190023 - 2⁴ = 19946190007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19946190013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9973095011 + 9973095012.

It is an arithmetic number, because the mean of its divisors is an integer number (9973095012).

Almost surely, 2^19946190023 is an apocalyptic number.

19946190023 is a deficient number, since it is larger than the sum of its proper divisors (1).

19946190023 is an equidigital number, since it uses as much as digits as its factorization.

19946190023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 19946190023 in words is "nineteen billion, nine hundred forty-six million, one hundred ninety thousand, twenty-three".