212836818999 has 24 divisors (see below), whose sum is σ = 334636379760. Its totient is φ = 119954991744.

The previous prime is 212836818991. The next prime is 212836819001. The reversal of 212836818999 is 999818638212.

It is a happy number.

It is not a de Polignac number, because 212836818999 - 2³ = 212836818991 is a prime.

It is a super-2 number, since 2×212836818999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212836818991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9906184 + ... + 9927645.

It is an arithmetic number, because the mean of its divisors is an integer number (13943182490).

Almost surely, 2^212836818999 is an apocalyptic number.

212836818999 is a deficient number, since it is larger than the sum of its proper divisors (121799560761).

212836818999 is a wasteful number, since it uses less digits than its factorization.

212836818999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19833919 (or 19833912 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 66.

The spelling of 212836818999 in words is "two hundred twelve billion, eight hundred thirty-six million, eight hundred eighteen thousand, nine hundred ninety-nine".