18212379213 has 8 divisors (see below), whose sum is σ = 27752196928. Its totient is φ = 10407073824.

The previous prime is 18212379197. The next prime is 18212379223. The reversal of 18212379213 is 31297321281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18212379213 - 2⁴ = 18212379197 is a prime.

It is a super-2 number, since 2×18212379213² (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 (18212379223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433628056 + ... + 433628097.

It is an arithmetic number, because the mean of its divisors is an integer number (3469024616).

Almost surely, 2^18212379213 is an apocalyptic number.

It is an amenable number.

18212379213 is a deficient number, since it is larger than the sum of its proper divisors (9539817715).

18212379213 is an equidigital number, since it uses as much as digits as its factorization.

18212379213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867256163.

The product of its digits is 36288, while the sum is 39.

The spelling of 18212379213 in words is "eighteen billion, two hundred twelve million, three hundred seventy-nine thousand, two hundred thirteen".