20000331998 has 4 divisors (see below), whose sum is σ = 30000498000. Its totient is φ = 10000165998.

The previous prime is 20000331979. The next prime is 20000332021. The reversal of 20000331998 is 89913300002.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5000082998 + ... + 5000083001.

It is an arithmetic number, because the mean of its divisors is an integer number (7500124500).

Almost surely, 2^20000331998 is an apocalyptic number.

20000331998 is a deficient number, since it is larger than the sum of its proper divisors (10000166002).

20000331998 is a wasteful number, since it uses less digits than its factorization.

20000331998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000166001.

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

The spelling of 20000331998 in words is "twenty billion, three hundred thirty-one thousand, nine hundred ninety-eight".