990020012 has 12 divisors (see below), whose sum is σ = 1735431600. Its totient is φ = 494182416.

The previous prime is 990020011. The next prime is 990020033. The reversal of 990020012 is 210020099.

It is a self number, because there is not a number n which added to its sum of digits gives 990020012.

It is not an unprimeable number, because it can be changed into a prime (990020011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204203 + ... + 208994.

It is an arithmetic number, because the mean of its divisors is an integer number (144619300).

Almost surely, 2^990020012 is an apocalyptic number.

It is an amenable number.

990020012 is a deficient number, since it is larger than the sum of its proper divisors (745411588).

990020012 is a wasteful number, since it uses less digits than its factorization.

990020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413800 (or 413798 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 990020012 is about 31464.5834550531. The cubic root of 990020012 is about 996.6622088790.

The spelling of 990020012 in words is "nine hundred ninety million, twenty thousand, twelve".