19425873601 has 4 divisors (see below), whose sum is σ = 19792399572. Its totient is φ = 19059347632.

The previous prime is 19425873473. The next prime is 19425873631. The reversal of 19425873601 is 10637852491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15930226225 + 3495647376 = 126215^2 + 59124^2 .

It is a cyclic number.

It is not a de Polignac number, because 19425873601 - 2⁷ = 19425873473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19425873631) 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, 183262906 + ... + 183263011.

It is an arithmetic number, because the mean of its divisors is an integer number (4948099893).

It is a 1-persistent number, because it is pandigital, but 2⋅19425873601 = 38851747202 is not.

Almost surely, 2^19425873601 is an apocalyptic number.

It is an amenable number.

19425873601 is a deficient number, since it is larger than the sum of its proper divisors (366525971).

19425873601 is an equidigital number, since it uses as much as digits as its factorization.

19425873601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366525970.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 19425873601 in words is "nineteen billion, four hundred twenty-five million, eight hundred seventy-three thousand, six hundred one".