990818020 has 24 divisors (see below), whose sum is σ = 2090587968. Its totient is φ = 394447200.

The previous prime is 990817981. The next prime is 990818057. The reversal of 990818020 is 20818099.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 113176 + ... + 121615.

It is an arithmetic number, because the mean of its divisors is an integer number (87107832).

Almost surely, 2^990818020 is an apocalyptic number.

It is an amenable number.

990818020 is an abundant number, since it is smaller than the sum of its proper divisors (1099769948).

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

990818020 is a wasteful number, since it uses less digits than its factorization.

990818020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235011 (or 235009 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 990818020 is about 31477.2619520822. The cubic root of 990818020 is about 996.9299242806.

The spelling of 990818020 in words is "nine hundred ninety million, eight hundred eighteen thousand, twenty".