18693549532343 has 16 divisors (see below), whose sum is σ = 21961739114496. Its totient is φ = 15580963500480.

The previous prime is 18693549532331. The next prime is 18693549532367. The reversal of 18693549532343 is 34323594539681.

It is not a de Polignac number, because 18693549532343 - 2³⁸ = 18418671625399 is a prime.

It is a super-2 number, since 2×18693549532343² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18693549532343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693549532313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257585471 + ... + 257658032.

It is an arithmetic number, because the mean of its divisors is an integer number (1372608694656).

Almost surely, 2^{18693549532343} is an apocalyptic number.

18693549532343 is a deficient number, since it is larger than the sum of its proper divisors (3268189582153).

18693549532343 is an equidigital number, since it uses as much as digits as its factorization.

18693549532343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515243654.

The product of its digits is 251942400, while the sum is 65.

The spelling of 18693549532343 in words is "eighteen trillion, six hundred ninety-three billion, five hundred forty-nine million, five hundred thirty-two thousand, three hundred forty-three".