19109291092 has 6 divisors (see below), whose sum is σ = 33441259418. Its totient is φ = 9554645544.

The previous prime is 19109291083. The next prime is 19109291101. The reversal of 19109291092 is 29019290191.

It is an interprime number because it is at equal distance from previous prime (19109291083) and next prime (19109291101).

It can be written as a sum of positive squares in only one way, i.e., 18910650256 + 198640836 = 137516^2 + 14094^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2388661383 + ... + 2388661390.

Almost surely, 2^19109291092 is an apocalyptic number.

It is an amenable number.

19109291092 is a deficient number, since it is larger than the sum of its proper divisors (14331968326).

19109291092 is a wasteful number, since it uses less digits than its factorization.

19109291092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777322777 (or 4777322775 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 43.

Subtracting 19109291092 from its reverse (29019290191), we obtain a palindrome (9909999099).

The spelling of 19109291092 in words is "nineteen billion, one hundred nine million, two hundred ninety-one thousand, ninety-two".