19071086869 has 4 divisors (see below), whose sum is σ = 19113561900. Its totient is φ = 19028611840.

The previous prime is 19071086861. The next prime is 19071086891. The reversal of 19071086869 is 96868017091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9282359025 + 9788727844 = 96345^2 + 98938^2 .

It is a cyclic number.

It is not a de Polignac number, because 19071086869 - 2³ = 19071086861 is a prime.

It is a super-2 number, since 2×19071086869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19071086861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21236842 + ... + 21237739.

It is an arithmetic number, because the mean of its divisors is an integer number (4778390475).

Almost surely, 2^19071086869 is an apocalyptic number.

It is an amenable number.

19071086869 is a deficient number, since it is larger than the sum of its proper divisors (42475031).

19071086869 is an equidigital number, since it uses as much as digits as its factorization.

19071086869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42475030.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 19071086869 in words is "nineteen billion, seventy-one million, eighty-six thousand, eight hundred sixty-nine".