18408180382 has 4 divisors (see below), whose sum is σ = 27612270576. Its totient is φ = 9204090190.

The previous prime is 18408180367. The next prime is 18408180409. The reversal of 18408180382 is 28308180481.

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

It is a super-2 number, since 2×18408180382² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4602045094 + ... + 4602045097.

It is an arithmetic number, because the mean of its divisors is an integer number (6903067644).

Almost surely, 2^18408180382 is an apocalyptic number.

18408180382 is a deficient number, since it is larger than the sum of its proper divisors (9204090194).

18408180382 is an equidigital number, since it uses as much as digits as its factorization.

18408180382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9204090193.

The product of its (nonzero) digits is 98304, while the sum is 43.

Subtracting 18408180382 from its reverse (28308180481), we obtain a palindrome (9900000099).

The spelling of 18408180382 in words is "eighteen billion, four hundred eight million, one hundred eighty thousand, three hundred eighty-two".