20503653036 has 24 divisors (see below), whose sum is σ = 48379408560. Its totient is φ = 6757757952.

The previous prime is 20503653019. The next prime is 20503653047. The reversal of 20503653036 is 63035630502.

It is a junction number, because it is equal to n+sod(n) for n = 20503652988 and 20503653006.

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 7 ways as a sum of consecutive naturals, for example, 9598021 + ... + 9600156.

It is an arithmetic number, because the mean of its divisors is an integer number (2015808690).

Almost surely, 2^20503653036 is an apocalyptic number.

It is an amenable number.

20503653036 is an abundant number, since it is smaller than the sum of its proper divisors (27875755524).

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

20503653036 is a wasteful number, since it uses less digits than its factorization.

20503653036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19198273 (or 19198271 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 33.

The spelling of 20503653036 in words is "twenty billion, five hundred three million, six hundred fifty-three thousand, thirty-six".