19045900331873 has 8 divisors (see below), whose sum is σ = 19363055435880. Its totient is φ = 18728904170880.

The previous prime is 19045900331869. The next prime is 19045900331897. The reversal of 19045900331873 is 37813300954091.

It can be written as a sum of positive squares in 4 ways, for example, as 3015421831009 + 16030478500864 = 1736497^2 + 4003808^2 .

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 19045900331873 - 2² = 19045900331869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19045900331833) 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, 39494090 + ... + 39973427.

It is an arithmetic number, because the mean of its divisors is an integer number (2420381929485).

Almost surely, 2^{19045900331873} is an apocalyptic number.

It is an amenable number.

19045900331873 is a deficient number, since it is larger than the sum of its proper divisors (317155104007).

19045900331873 is an equidigital number, since it uses as much as digits as its factorization.

19045900331873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79471507.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 19045900331873 in words is "nineteen trillion, forty-five billion, nine hundred million, three hundred thirty-one thousand, eight hundred seventy-three".