19494503071 has 2 divisors, whose sum is σ = 19494503072. Its totient is φ = 19494503070.

The previous prime is 19494503069. The next prime is 19494503141. The reversal of 19494503071 is 17030549491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19494503071 - 2¹ = 19494503069 is a prime.

Together with 19494503069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19494503011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747251535 + 9747251536.

It is an arithmetic number, because the mean of its divisors is an integer number (9747251536).

Almost surely, 2^19494503071 is an apocalyptic number.

19494503071 is a deficient number, since it is larger than the sum of its proper divisors (1).

19494503071 is an equidigital number, since it uses as much as digits as its factorization.

19494503071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 19494503071 in words is "nineteen billion, four hundred ninety-four million, five hundred three thousand, seventy-one".