20000331992 has 8 divisors (see below), whose sum is σ = 37500622500. Its totient is φ = 10000165992.

The previous prime is 20000331979. The next prime is 20000332021. The reversal of 20000331992 is 29913300002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250020742 + ... + 1250020757.

Almost surely, 2^20000331992 is an apocalyptic number.

It is an amenable number.

20000331992 is a deficient number, since it is larger than the sum of its proper divisors (17500290508).

20000331992 is a wasteful number, since it uses less digits than its factorization.

20000331992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500041505 (or 2500041501 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

Adding to 20000331992 its reverse (29913300002), we get a palindrome (49913631994).

The spelling of 20000331992 in words is "twenty billion, three hundred thirty-one thousand, nine hundred ninety-two".