18362226381 has 4 divisors (see below), whose sum is σ = 24482968512. Its totient is φ = 12241484252.

The previous prime is 18362226367. The next prime is 18362226419.

18362226381 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 18362226381 - 2¹⁷ = 18362095309 is a prime.

It is a super-2 number, since 2×18362226381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18362226481) 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, 3060371061 + ... + 3060371066.

It is an arithmetic number, because the mean of its divisors is an integer number (6120742128).

Almost surely, 2^18362226381 is an apocalyptic number.

It is an amenable number.

18362226381 is a deficient number, since it is larger than the sum of its proper divisors (6120742131).

18362226381 is an equidigital number, since it uses as much as digits as its factorization.

18362226381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120742130.

The product of its digits is 165888, while the sum is 42.

The spelling of 18362226381 in words is "eighteen billion, three hundred sixty-two million, two hundred twenty-six thousand, three hundred eighty-one".