918181823381 has 16 divisors (see below), whose sum is σ = 997383953664. Its totient is φ = 842063998464.

The previous prime is 918181823369. The next prime is 918181823387. The reversal of 918181823381 is 183328181819.

It is a cyclic number.

It is not a de Polignac number, because 918181823381 - 2³⁴ = 901001954197 is a prime.

It is a super-2 number, since 2×918181823381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918181823387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4354061 + ... + 4560066.

It is an arithmetic number, because the mean of its divisors is an integer number (62336497104).

Almost surely, 2^918181823381 is an apocalyptic number.

It is an amenable number.

918181823381 is a deficient number, since it is larger than the sum of its proper divisors (79202130283).

918181823381 is a wasteful number, since it uses less digits than its factorization.

918181823381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914300.

The product of its digits is 663552, while the sum is 53.

The spelling of 918181823381 in words is "nine hundred eighteen billion, one hundred eighty-one million, eight hundred twenty-three thousand, three hundred eighty-one".