19225318873 has 4 divisors (see below), whose sum is σ = 19268717328. Its totient is φ = 19181920420.

The previous prime is 19225318859. The next prime is 19225318901. The reversal of 19225318873 is 37881352291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37881352291 = 23 ⋅1647015317.

It is a cyclic number.

It is not a de Polignac number, because 19225318873 - 2¹³ = 19225310681 is a prime.

It is a super-2 number, since 2×19225318873² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19225318813) 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, 21698563 + ... + 21699448.

It is an arithmetic number, because the mean of its divisors is an integer number (4817179332).

Almost surely, 2^19225318873 is an apocalyptic number.

It is an amenable number.

19225318873 is a deficient number, since it is larger than the sum of its proper divisors (43398455).

19225318873 is an equidigital number, since it uses as much as digits as its factorization.

19225318873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43398454.

The product of its digits is 725760, while the sum is 49.

The spelling of 19225318873 in words is "nineteen billion, two hundred twenty-five million, three hundred eighteen thousand, eight hundred seventy-three".