20000331980 has 48 divisors (see below), whose sum is σ = 43676720640. Its totient is φ = 7683782400.

The previous prime is 20000331979. The next prime is 20000332021. The reversal of 20000331980 is 8913300002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20510 + ... + 201050.

It is an arithmetic number, because the mean of its divisors is an integer number (909931680).

Almost surely, 2^20000331980 is an apocalyptic number.

20000331980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000331980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21838360320).

20000331980 is an abundant number, since it is smaller than the sum of its proper divisors (23676388660).

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

20000331980 is a wasteful number, since it uses less digits than its factorization.

20000331980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180770 (or 180768 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 20000331980 its reverse (8913300002), we get a palindrome (28913631982).

The spelling of 20000331980 in words is "twenty billion, three hundred thirty-one thousand, nine hundred eighty".