99942020 has 12 divisors (see below), whose sum is σ = 209878284. Its totient is φ = 39976800.

The previous prime is 99941981. The next prime is 99942023. The reversal of 99942020 is 2024999.

It can be written as a sum of positive squares in 2 ways, for example, as 72148036 + 27793984 = 8494^2 + 5272^2 .

It is not an unprimeable number, because it can be changed into a prime (99942023) 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, 2498531 + ... + 2498570.

It is an arithmetic number, because the mean of its divisors is an integer number (17489857).

Almost surely, 2^99942020 is an apocalyptic number.

It is an amenable number.

99942020 is an abundant number, since it is smaller than the sum of its proper divisors (109936264).

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

99942020 is a wasteful number, since it uses less digits than its factorization.

99942020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997110 (or 4997108 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 99942020 is about 9997.1005796681. The cubic root of 99942020 is about 464.0691595782.

The spelling of 99942020 in words is "ninety-nine million, nine hundred forty-two thousand, twenty".