9999993999894 has 32 divisors (see below), whose sum is σ = 20282666582016. Its totient is φ = 3286222813440.

The previous prime is 9999993999857. The next prime is 9999993999913. The reversal of 9999993999894 is 4989993999999.

It is a happy number.

It is a super-2 number, since 2×9999993999894² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9999993999792 and 9999993999801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8340459 + ... + 9463785.

It is an arithmetic number, because the mean of its divisors is an integer number (633833330688).

Almost surely, 2^{9999993999894} is an apocalyptic number.

9999993999894 is an abundant number, since it is smaller than the sum of its proper divisors (10282672582122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999993999894 is a wasteful number, since it uses less digits than its factorization.

9999993999894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144300.

The product of its digits is 334731302496, while the sum is 105.

Adding to 9999993999894 its sum of digits (105), we get a palindrome (9999993999999).

The spelling of 9999993999894 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-three million, nine hundred ninety-nine thousand, eight hundred ninety-four".