20031486720 has 288 divisors, whose sum is σ = 73430945280. Its totient is φ = 4558848000.

The previous prime is 20031486719. The next prime is 20031486731. The reversal of 20031486720 is 2768413002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6745396 + ... + 6748364.

It is an arithmetic number, because the mean of its divisors is an integer number (254968560).

Almost surely, 2^20031486720 is an apocalyptic number.

20031486720 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 20031486720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36715472640).

20031486720 is an abundant number, since it is smaller than the sum of its proper divisors (53399458560).

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

20031486720 is a wasteful number, since it uses less digits than its factorization.

20031486720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251 (or 3237 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 20031486720 its reverse (2768413002), we get a palindrome (22799899722).

The spelling of 20031486720 in words is "twenty billion, thirty-one million, four hundred eighty-six thousand, seven hundred twenty".