18193693456 has 15 divisors (see below), whose sum is σ = 35251326453. Its totient is φ = 9096576960.

The previous prime is 18193693423. The next prime is 18193693487. The reversal of 18193693456 is 65439639181.

The square root of 18193693456 is 134884.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 387459856 + 17806233600 = 19684^2 + 133440^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18193693397 and 18193693406.

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 in 2 ways as a sum of consecutive naturals, for example, 522676 + ... + 556396.

Almost surely, 2^18193693456 is an apocalyptic number.

18193693456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18193693456 is the 134884-th square number.

It is an amenable number.

18193693456 is a deficient number, since it is larger than the sum of its proper divisors (17057632997).

18193693456 is an frugal number, since it uses more digits than its factorization.

18193693456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67450 (or 33723 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 55.

The spelling of 18193693456 in words is "eighteen billion, one hundred ninety-three million, six hundred ninety-three thousand, four hundred fifty-six".