99020 has 12 divisors (see below), whose sum is σ = 207984. Its totient is φ = 39600.

The previous prime is 99017. The next prime is 99023. The reversal of 99020 is 2099.

It is an interprime number because it is at equal distance from previous prime (99017) and next prime (99023).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 4951 = 99020 / (9 + 9 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 98983 and 99001.

It is not an unprimeable number, because it can be changed into a prime (99023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2456 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (17332).

2⁹⁹⁰²⁰ is an apocalyptic number.

It is an amenable number.

99020 is an abundant number, since it is smaller than the sum of its proper divisors (108964).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103992).

99020 is a wasteful number, since it uses less digits than its factorization.

99020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 99020 is about 314.6744349324. The cubic root of 99020 is about 46.2637650774.

The spelling of 99020 in words is "ninety-nine thousand, twenty".