18752425781 has 8 divisors (see below), whose sum is σ = 18786067584. Its totient is φ = 18718809120.

The previous prime is 18752425777. The next prime is 18752425793.

It is a happy number.

18752425781 is nontrivially palindromic in base 10.

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 18752425781 - 2² = 18752425777 is a prime.

It is a super-2 number, since 2×18752425781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18752428781) 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, 2055476 + ... + 2064578.

It is an arithmetic number, because the mean of its divisors is an integer number (2348258448).

Almost surely, 2^18752425781 is an apocalyptic number.

It is an amenable number.

18752425781 is a deficient number, since it is larger than the sum of its proper divisors (33641803).

18752425781 is an equidigital number, since it uses as much as digits as its factorization.

18752425781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571.

The product of its digits is 1254400, while the sum is 50.

The spelling of 18752425781 in words is "eighteen billion, seven hundred fifty-two million, four hundred twenty-five thousand, seven hundred eighty-one".