18693549532345 has 4 divisors (see below), whose sum is σ = 22432259438820. Its totient is φ = 14954839625872.

The previous prime is 18693549532331. The next prime is 18693549532367. The reversal of 18693549532345 is 54323594539681.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8765454343801 + 9928095188544 = 2960651^2 + 3150888^2 .

It is a cyclic number.

It is not a de Polignac number, because 18693549532345 - 2⁵ = 18693549532313 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 1869354953230 + ... + 1869354953239.

It is an arithmetic number, because the mean of its divisors is an integer number (5608064859705).

Almost surely, 2^{18693549532345} is an apocalyptic number.

It is an amenable number.

18693549532345 is a deficient number, since it is larger than the sum of its proper divisors (3738709906475).

18693549532345 is an equidigital number, since it uses as much as digits as its factorization.

18693549532345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738709906474.

The product of its digits is 419904000, while the sum is 67.

The spelling of 18693549532345 in words is "eighteen trillion, six hundred ninety-three billion, five hundred forty-nine million, five hundred thirty-two thousand, three hundred forty-five".