999634188143020 has 48 divisors (see below), whose sum is σ = 2107289248747200. Its totient is φ = 398319280024320.

The previous prime is 999634188142999. The next prime is 999634188143027. The reversal of 999634188143020 is 20341881436999.

It is not an unprimeable number, because it can be changed into a prime (999634188143027) 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, 33534886 + ... + 55891474.

It is an arithmetic number, because the mean of its divisors is an integer number (43901859348900).

Almost surely, 2^{999634188143020} is an apocalyptic number.

It is an amenable number.

999634188143020 is an abundant number, since it is smaller than the sum of its proper divisors (1107655060604180).

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

999634188143020 is a wasteful number, since it uses less digits than its factorization.

999634188143020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22365178 (or 22365176 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 67.

The spelling of 999634188143020 in words is "nine hundred ninety-nine trillion, six hundred thirty-four billion, one hundred eighty-eight million, one hundred forty-three thousand, twenty".