918838838819 has 24 divisors (see below), whose sum is σ = 1022396442672. Its totient is φ = 818936066880.

The previous prime is 918838838791. The next prime is 918838838821.

It is a happy number.

918838838819 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-918838838819 is a prime.

It is a super-2 number, since 2×918838838819² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918838838899) 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, 14250377 + ... + 14314709.

It is an arithmetic number, because the mean of its divisors is an integer number (42599851778).

Almost surely, 2^918838838819 is an apocalyptic number.

918838838819 is a deficient number, since it is larger than the sum of its proper divisors (103557603853).

918838838819 is a wasteful number, since it uses less digits than its factorization.

918838838819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64835 (or 64776 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 74.

The spelling of 918838838819 in words is "nine hundred eighteen billion, eight hundred thirty-eight million, eight hundred thirty-eight thousand, eight hundred nineteen".