20501225000 has 96 divisors (see below), whose sum is σ = 48269957400. Its totient is φ = 8162400000.

The previous prime is 20501224981. The next prime is 20501225047. The reversal of 20501225000 is 52210502.

It can be written as a sum of positive squares in 12 ways, for example, as 1380419716 + 19120805284 = 37154^2 + 138278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20501225000.

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, 5723210 + ... + 5726790.

Almost surely, 2^20501225000 is an apocalyptic number.

20501225000 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 20501225000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24134978700).

20501225000 is an abundant number, since it is smaller than the sum of its proper divisors (27768732400).

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

20501225000 is an equidigital number, since it uses as much as digits as its factorization.

20501225000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 20501225000 its reverse (52210502), we get a palindrome (20553435502).

The spelling of 20501225000 in words is "twenty billion, five hundred one million, two hundred twenty-five thousand".