20720205000 has 400 divisors, whose sum is σ = 79131357360. Its totient is φ = 5022000000.

The previous prime is 20720204993. The next prime is 20720205007. The reversal of 20720205000 is 50202702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20720204993) and next prime (20720205007).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20720205007) by changing a digit.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 4452675 + ... + 4457325.

Almost surely, 2^20720205000 is an apocalyptic number.

20720205000 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 20720205000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39565678680).

20720205000 is an abundant number, since it is smaller than the sum of its proper divisors (58411152360).

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

20720205000 is a wasteful number, since it uses less digits than its factorization.

20720205000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4672 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

Adding to 20720205000 its reverse (50202702), we get a palindrome (20770407702).

The spelling of 20720205000 in words is "twenty billion, seven hundred twenty million, two hundred five thousand".