18346993207 has 4 divisors (see below), whose sum is σ = 18351954216. Its totient is φ = 18342032200.

The previous prime is 18346993193. The next prime is 18346993219. The reversal of 18346993207 is 70239964381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70239964381 = 16673 ⋅4212797.

It is a cyclic number.

It is not a de Polignac number, because 18346993207 - 2¹⁹ = 18346468919 is a prime.

It is a super-2 number, since 2×18346993207² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18346993277) 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, 2474953 + ... + 2482354.

It is an arithmetic number, because the mean of its divisors is an integer number (4587988554).

Almost surely, 2^18346993207 is an apocalyptic number.

18346993207 is a deficient number, since it is larger than the sum of its proper divisors (4961009).

18346993207 is an equidigital number, since it uses as much as digits as its factorization.

18346993207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961008.

The product of its (nonzero) digits is 1959552, while the sum is 52.

It can be divided in two parts, 183469 and 93207, that added together give a square (276676 = 526²).

The spelling of 18346993207 in words is "eighteen billion, three hundred forty-six million, nine hundred ninety-three thousand, two hundred seven".