20303201998 has 16 divisors (see below), whose sum is σ = 30882530016. Its totient is φ = 10009872000.

The previous prime is 20303201981. The next prime is 20303202013. The reversal of 20303201998 is 89910230302.

It is a super-2 number, since 2×20303201998² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 163503 + ... + 259498.

It is an arithmetic number, because the mean of its divisors is an integer number (1930158126).

Almost surely, 2^20303201998 is an apocalyptic number.

20303201998 is a deficient number, since it is larger than the sum of its proper divisors (10579328018).

20303201998 is a wasteful number, since it uses less digits than its factorization.

20303201998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423339.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 20303201998 in words is "twenty billion, three hundred three million, two hundred one thousand, nine hundred ninety-eight".