19100690909 has 8 divisors (see below), whose sum is σ = 19210375800. Its totient is φ = 18991302400.

The previous prime is 19100690891. The next prime is 19100690911. The reversal of 19100690909 is 90909600191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2280100 + 19098410809 = 1510^2 + 138197^2 .

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 19100690909 - 2¹⁶ = 19100625373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19100690909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19100690989) 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, 55817 + ... + 203265.

It is an arithmetic number, because the mean of its divisors is an integer number (2401296975).

Almost surely, 2^19100690909 is an apocalyptic number.

It is an amenable number.

19100690909 is a deficient number, since it is larger than the sum of its proper divisors (109684891).

19100690909 is a wasteful number, since it uses less digits than its factorization.

19100690909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148191.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 19100690909 in words is "nineteen billion, one hundred million, six hundred ninety thousand, nine hundred nine".