20651523200 has 192 divisors, whose sum is σ = 63604768320. Its totient is φ = 6436761600.

The previous prime is 20651523157. The next prime is 20651523241. The reversal of 20651523200 is 232515602.

It is a self number, because there is not a number n which added to its sum of digits gives 20651523200.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 204494 + ... + 288306.

It is an arithmetic number, because the mean of its divisors is an integer number (331274835).

Almost surely, 2^20651523200 is an apocalyptic number.

20651523200 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 20651523200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31802384160).

20651523200 is an abundant number, since it is smaller than the sum of its proper divisors (42953245120).

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

20651523200 is a wasteful number, since it uses less digits than its factorization.

20651523200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83855 (or 83838 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 20651523200 in words is "twenty billion, six hundred fifty-one million, five hundred twenty-three thousand, two hundred".