20501505200 has 120 divisors (see below), whose sum is σ = 54265763376. Its totient is φ = 7381120000.

The previous prime is 20501505169. The next prime is 20501505217. The reversal of 20501505200 is 250510502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421334 + ... + 467466.

Almost surely, 2^20501505200 is an apocalyptic number.

20501505200 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 20501505200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27132881688).

20501505200 is an abundant number, since it is smaller than the sum of its proper divisors (33764258176).

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

20501505200 is a wasteful number, since it uses less digits than its factorization.

20501505200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46263 (or 46252 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The spelling of 20501505200 in words is "twenty billion, five hundred one million, five hundred five thousand, two hundred".