18293963782 has 4 divisors (see below), whose sum is σ = 27440945676. Its totient is φ = 9146981890.

The previous prime is 18293963749. The next prime is 18293963801. The reversal of 18293963782 is 28736939281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28736939281 = 17 ⋅1690408193.

It is a super-2 number, since 2×18293963782² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 4573490944 + ... + 4573490947.

It is an arithmetic number, because the mean of its divisors is an integer number (6860236419).

Almost surely, 2^18293963782 is an apocalyptic number.

18293963782 is a deficient number, since it is larger than the sum of its proper divisors (9146981894).

18293963782 is an equidigital number, since it uses as much as digits as its factorization.

18293963782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146981893.

The product of its digits is 7838208, while the sum is 58.

The spelling of 18293963782 in words is "eighteen billion, two hundred ninety-three million, nine hundred sixty-three thousand, seven hundred eighty-two".