20903602560 has 512 divisors, whose sum is σ = 74083921920. Its totient is φ = 4989911040.

The previous prime is 20903602537. The next prime is 20903602561. The reversal of 20903602560 is 6520630902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20903602561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73864179 + ... + 73864461.

It is an arithmetic number, because the mean of its divisors is an integer number (144695160).

Almost surely, 2^20903602560 is an apocalyptic number.

20903602560 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 20903602560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37041960960).

20903602560 is an abundant number, since it is smaller than the sum of its proper divisors (53180319360).

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

20903602560 is a wasteful number, since it uses less digits than its factorization.

20903602560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 20903602560 in words is "twenty billion, nine hundred three million, six hundred two thousand, five hundred sixty".