1218694193023 has 4 divisors (see below), whose sum is σ = 1222587785008. Its totient is φ = 1214800601040.

The previous prime is 1218694193009. The next prime is 1218694193063. The reversal of 1218694193023 is 3203914968121.

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

It is not a de Polignac number, because 1218694193023 - 2¹⁷ = 1218694061951 is a prime.

It is a super-3 number, since 3×1218694193023³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218694193063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946795523 + ... + 1946796148.

It is an arithmetic number, because the mean of its divisors is an integer number (305646946252).

Almost surely, 2^{1218694193023} is an apocalyptic number.

1218694193023 is a deficient number, since it is larger than the sum of its proper divisors (3893591985).

1218694193023 is an equidigital number, since it uses as much as digits as its factorization.

1218694193023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893591984.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 1218694193023 in words is "one trillion, two hundred eighteen billion, six hundred ninety-four million, one hundred ninety-three thousand, twenty-three".