18893520446 has 4 divisors (see below), whose sum is σ = 28340280672. Its totient is φ = 9446760222.

The previous prime is 18893520439. The next prime is 18893520467. The reversal of 18893520446 is 64402539881.

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

It is a super-2 number, since 2×18893520446² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18893520394 and 18893520403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4723380110 + ... + 4723380113.

It is an arithmetic number, because the mean of its divisors is an integer number (7085070168).

Almost surely, 2^18893520446 is an apocalyptic number.

18893520446 is a deficient number, since it is larger than the sum of its proper divisors (9446760226).

18893520446 is an equidigital number, since it uses as much as digits as its factorization.

18893520446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446760225.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 18893520446 in words is "eighteen billion, eight hundred ninety-three million, five hundred twenty thousand, four hundred forty-six".