20503125536 has 96 divisors (see below), whose sum is σ = 44516449152. Its totient is φ = 9254891520.

The previous prime is 20503125529. The next prime is 20503125563. The reversal of 20503125536 is 63552130502.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421915 + ... + 1436261.

It is an arithmetic number, because the mean of its divisors is an integer number (463713012).

Almost surely, 2^20503125536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20503125536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22258224576).

20503125536 is an abundant number, since it is smaller than the sum of its proper divisors (24013323616).

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

20503125536 is a wasteful number, since it uses less digits than its factorization.

20503125536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14482 (or 14474 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 20503125536 in words is "twenty billion, five hundred three million, one hundred twenty-five thousand, five hundred thirty-six".