19713423069 has 6 divisors (see below), whose sum is σ = 28474944446. Its totient is φ = 13142282040.

The previous prime is 19713423047. The next prime is 19713423089. The reversal of 19713423069 is 96032431791.

It can be written as a sum of positive squares in only one way, i.e., 15329658969 + 4383764100 = 123813^2 + 66210^2 .

It is not a de Polignac number, because 19713423069 - 2²⁷ = 19579205341 is a prime.

It is a super-2 number, since 2×19713423069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19713423019) 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 5 ways as a sum of consecutive naturals, for example, 1095190162 + ... + 1095190179.

Almost surely, 2^19713423069 is an apocalyptic number.

It is an amenable number.

19713423069 is a deficient number, since it is larger than the sum of its proper divisors (8761521377).

19713423069 is a wasteful number, since it uses less digits than its factorization.

19713423069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190380347 (or 2190380344 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 19713423069 in words is "nineteen billion, seven hundred thirteen million, four hundred twenty-three thousand, sixty-nine".