18129202214 has 4 divisors (see below), whose sum is σ = 27193803324. Its totient is φ = 9064601106.

The previous prime is 18129202213. The next prime is 18129202277. The reversal of 18129202214 is 41220292181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41220292181 = 48193 ⋅855317.

It is a super-2 number, since 2×18129202214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18129202213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4532300552 + ... + 4532300555.

It is an arithmetic number, because the mean of its divisors is an integer number (6798450831).

Almost surely, 2^18129202214 is an apocalyptic number.

18129202214 is a deficient number, since it is larger than the sum of its proper divisors (9064601110).

18129202214 is an equidigital number, since it uses as much as digits as its factorization.

18129202214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9064601109.

The product of its (nonzero) digits is 4608, while the sum is 32.

Adding to 18129202214 its reverse (41220292181), we get a palindrome (59349494395).

The spelling of 18129202214 in words is "eighteen billion, one hundred twenty-nine million, two hundred two thousand, two hundred fourteen".