19161423423 has 40 divisors (see below), whose sum is σ = 30104908416. Its totient is φ = 12128875200.

The previous prime is 19161423419. The next prime is 19161423427. The reversal of 19161423423 is 32432416191.

19161423423 is a `hidden beast` number, since 1 + 9 + 1 + 614 + 2 + 34 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (19161423419) and next prime (19161423427).

It is not a de Polignac number, because 19161423423 - 2² = 19161423419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19161423427) 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 in 39 ways as a sum of consecutive naturals, for example, 61093 + ... + 205073.

Almost surely, 2^19161423423 is an apocalyptic number.

19161423423 is a deficient number, since it is larger than the sum of its proper divisors (10943484993).

19161423423 is a wasteful number, since it uses less digits than its factorization.

19161423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144077 (or 144068 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The spelling of 19161423423 in words is "nineteen billion, one hundred sixty-one million, four hundred twenty-three thousand, four hundred twenty-three".