999923020 has 24 divisors (see below), whose sum is σ = 2100493584. Its totient is φ = 399844416.

The previous prime is 999922981. The next prime is 999923027. The reversal of 999923020 is 20329999.

It is a super-3 number, since 3×999923020³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (999923027) by changing a digit.

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, 84594 + ... + 95686.

It is an arithmetic number, because the mean of its divisors is an integer number (87520566).

Almost surely, 2^999923020 is an apocalyptic number.

It is an amenable number.

999923020 is an abundant number, since it is smaller than the sum of its proper divisors (1100570564).

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

999923020 is a wasteful number, since it uses less digits than its factorization.

999923020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15609 (or 15607 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 999923020 is about 31621.5594175872. The cubic root of 999923020 is about 999.9743393415.

The spelling of 999923020 in words is "nine hundred ninety-nine million, nine hundred twenty-three thousand, twenty".