19790519423 has 2 divisors, whose sum is σ = 19790519424. Its totient is φ = 19790519422.

The previous prime is 19790519393. The next prime is 19790519461. The reversal of 19790519423 is 32491509791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19790519423 - 2¹⁰ = 19790518399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19790519123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9895259711 + 9895259712.

It is an arithmetic number, because the mean of its divisors is an integer number (9895259712).

Almost surely, 2^19790519423 is an apocalyptic number.

19790519423 is a deficient number, since it is larger than the sum of its proper divisors (1).

19790519423 is an equidigital number, since it uses as much as digits as its factorization.

19790519423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 19790519423 in words is "nineteen billion, seven hundred ninety million, five hundred nineteen thousand, four hundred twenty-three".