18248360381 has 4 divisors (see below), whose sum is σ = 18321063264. Its totient is φ = 18175657500.

The previous prime is 18248360359. The next prime is 18248360393. The reversal of 18248360381 is 18306384281.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18248360381 is a prime.

It is a super-2 number, since 2×18248360381² (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 (18248360281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36351065 + ... + 36351566.

It is an arithmetic number, because the mean of its divisors is an integer number (4580265816).

Almost surely, 2^18248360381 is an apocalyptic number.

It is an amenable number.

18248360381 is a deficient number, since it is larger than the sum of its proper divisors (72702883).

18248360381 is an equidigital number, since it uses as much as digits as its factorization.

18248360381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72702882.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 18248360381 in words is "eighteen billion, two hundred forty-eight million, three hundred sixty thousand, three hundred eighty-one".