18572253019 has 4 divisors (see below), whose sum is σ = 19549740040. Its totient is φ = 17594766000.

The previous prime is 18572253017. The next prime is 18572253061. The reversal of 18572253019 is 91035227581.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18572253019 - 2¹ = 18572253017 is a prime.

It is a super-2 number, since 2×18572253019² (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 (18572253017) 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, 488743482 + ... + 488743519.

It is an arithmetic number, because the mean of its divisors is an integer number (4887435010).

Almost surely, 2^18572253019 is an apocalyptic number.

18572253019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18572253019 is a deficient number, since it is larger than the sum of its proper divisors (977487021).

18572253019 is an equidigital number, since it uses as much as digits as its factorization.

18572253019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977487020.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 18572253019 in words is "eighteen billion, five hundred seventy-two million, two hundred fifty-three thousand, nineteen".