18381828382 has 4 divisors (see below), whose sum is σ = 27572742576. Its totient is φ = 9190914190.

The previous prime is 18381828347. The next prime is 18381828461. The reversal of 18381828382 is 28382818381.

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

It is a super-2 number, since 2×18381828382² (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, 4595457094 + ... + 4595457097.

It is an arithmetic number, because the mean of its divisors is an integer number (6893185644).

Almost surely, 2^18381828382 is an apocalyptic number.

18381828382 is a deficient number, since it is larger than the sum of its proper divisors (9190914194).

18381828382 is an equidigital number, since it uses as much as digits as its factorization.

18381828382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190914193.

The product of its digits is 1179648, while the sum is 52.

The spelling of 18381828382 in words is "eighteen billion, three hundred eighty-one million, eight hundred twenty-eight thousand, three hundred eighty-two".