20538503500 has 48 divisors (see below), whose sum is σ = 45209428992. Its totient is φ = 8150688000.

The previous prime is 20538503477. The next prime is 20538503527. The reversal of 20538503500 is 530583502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98221 + ... + 225220.

It is an arithmetic number, because the mean of its divisors is an integer number (941863104).

Almost surely, 2^20538503500 is an apocalyptic number.

20538503500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20538503500 is an abundant number, since it is smaller than the sum of its proper divisors (24670925492).

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

20538503500 is a wasteful number, since it uses less digits than its factorization.

20538503500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323587 (or 323575 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 20538503500 in words is "twenty billion, five hundred thirty-eight million, five hundred three thousand, five hundred".