20508919200 has 1728 divisors, whose sum is σ = 99743616000. Its totient is φ = 3968870400.

The previous prime is 20508919177. The next prime is 20508919241. The reversal of 20508919200 is 291980502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 347608771 + ... + 347608829.

It is an arithmetic number, because the mean of its divisors is an integer number (57722000).

Almost surely, 2^20508919200 is an apocalyptic number.

20508919200 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 20508919200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49871808000).

20508919200 is an abundant number, since it is smaller than the sum of its proper divisors (79234696800).

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

20508919200 is a wasteful number, since it uses less digits than its factorization.

20508919200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 20508919200 in words is "twenty billion, five hundred eight million, nine hundred nineteen thousand, two hundred".