19091000957 has 8 divisors (see below), whose sum is σ = 21948936576. Its totient is φ = 16265727792.

The previous prime is 19091000941. The next prime is 19091000989. The reversal of 19091000957 is 75900019091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19091000957 - 2⁴ = 19091000941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19091000057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8164358 + ... + 8166695.

It is an arithmetic number, because the mean of its divisors is an integer number (2743617072).

Almost surely, 2^19091000957 is an apocalyptic number.

It is an amenable number.

19091000957 is a deficient number, since it is larger than the sum of its proper divisors (2857935619).

19091000957 is a wasteful number, since it uses less digits than its factorization.

19091000957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16331227.

The product of its (nonzero) digits is 25515, while the sum is 41.

The spelling of 19091000957 in words is "nineteen billion, ninety-one million, nine hundred fifty-seven", and thus it is an aban number.