19090518900709 has 4 divisors (see below), whose sum is σ = 19140889663360. Its totient is φ = 19040148138060.

The previous prime is 19090518900611. The next prime is 19090518900737. The reversal of 19090518900709 is 90700981509091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19090518900709 - 2²⁵ = 19090485346277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19090518901709) 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, 25185380757 + ... + 25185381514.

It is an arithmetic number, because the mean of its divisors is an integer number (4785222415840).

Almost surely, 2^{19090518900709} is an apocalyptic number.

It is an amenable number.

19090518900709 is a deficient number, since it is larger than the sum of its proper divisors (50370762651).

19090518900709 is an equidigital number, since it uses as much as digits as its factorization.

19090518900709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50370762650.

The product of its (nonzero) digits is 1837080, while the sum is 58.

The spelling of 19090518900709 in words is "nineteen trillion, ninety billion, five hundred eighteen million, nine hundred thousand, seven hundred nine".