19391129202869 has 2 divisors, whose sum is σ = 19391129202870. Its totient is φ = 19391129202868.

The previous prime is 19391129202833. The next prime is 19391129202931. The reversal of 19391129202869 is 96820292119391.

It is an a-pointer prime, because the next prime (19391129202931) can be obtained adding 19391129202869 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15627102390769 + 3764026812100 = 3953113^2 + 1940110^2 .

It is a cyclic number.

It is not a de Polignac number, because 19391129202869 - 2¹⁶ = 19391129137333 is a prime.

It is a super-2 number, since 2×19391129202869² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19391129202769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9695564601434 + 9695564601435.

It is an arithmetic number, because the mean of its divisors is an integer number (9695564601435).

Almost surely, 2^{19391129202869} is an apocalyptic number.

It is an amenable number.

19391129202869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19391129202869 is an equidigital number, since it uses as much as digits as its factorization.

19391129202869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 62.

The spelling of 19391129202869 in words is "nineteen trillion, three hundred ninety-one billion, one hundred twenty-nine million, two hundred two thousand, eight hundred sixty-nine".