20501515200 has 336 divisors, whose sum is σ = 71841116160. Its totient is φ = 5107200000.

The previous prime is 20501515123. The next prime is 20501515207. The reversal of 20501515200 is 251510502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501515207) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 4312825 + ... + 4317575.

Almost surely, 2^20501515200 is an apocalyptic number.

20501515200 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 20501515200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35920558080).

20501515200 is an abundant number, since it is smaller than the sum of its proper divisors (51339600960).

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

20501515200 is a wasteful number, since it uses less digits than its factorization.

20501515200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836 (or 4821 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The spelling of 20501515200 in words is "twenty billion, five hundred one million, five hundred fifteen thousand, two hundred".