202021998 has 32 divisors (see below), whose sum is σ = 424634496. Its totient is φ = 63993888.

The previous prime is 202021993. The next prime is 202022011. The reversal of 202021998 is 899120202.

It is a happy number.

It is a super-3 number, since 3×202021998³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036 + ... + 20127.

It is an arithmetic number, because the mean of its divisors is an integer number (13269828).

Almost surely, 2^202021998 is an apocalyptic number.

202021998 is an abundant number, since it is smaller than the sum of its proper divisors (222612498).

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

202021998 is a wasteful number, since it uses less digits than its factorization.

202021998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21248.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 202021998 is about 14213.4442694232. Note that the first 3 decimals coincide. The cubic root of 202021998 is about 586.7677291602.

The spelling of 202021998 in words is "two hundred two million, twenty-one thousand, nine hundred ninety-eight".