19425040385 has 8 divisors (see below), whose sum is σ = 23692180776. Its totient is φ = 15285277440.

The previous prime is 19425040351. The next prime is 19425040387. The reversal of 19425040385 is 58304052491.

It can be written as a sum of positive squares in 4 ways, for example, as 349839616 + 19075200769 = 18704^2 + 138113^2 .

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

It is not a de Polignac number, because 19425040385 - 2²⁶ = 19357931521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19425040387) 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, 31844024 + ... + 31844633.

It is an arithmetic number, because the mean of its divisors is an integer number (2961522597).

Almost surely, 2^19425040385 is an apocalyptic number.

It is an amenable number.

19425040385 is a deficient number, since it is larger than the sum of its proper divisors (4267140391).

19425040385 is an equidigital number, since it uses as much as digits as its factorization.

19425040385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63688723.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 19425040385 in words is "nineteen billion, four hundred twenty-five million, forty thousand, three hundred eighty-five".