20502155513050 has 24 divisors (see below), whose sum is σ = 38759156952732. Its totient is φ = 8066421840000.

The previous prime is 20502155512999. The next prime is 20502155513053. The reversal of 20502155513050 is 5031555120502.

It can be written as a sum of positive squares in 6 ways, for example, as 7458912672201 + 13043242840849 = 2731101^2 + 3611543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20502155512997 and 20502155513015.

It is not an unprimeable number, because it can be changed into a prime (20502155513053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3361006051 + ... + 3361012150.

Almost surely, 2^{20502155513050} is an apocalyptic number.

20502155513050 is a deficient number, since it is larger than the sum of its proper divisors (18257001439682).

20502155513050 is a wasteful number, since it uses less digits than its factorization.

20502155513050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722018274 (or 6722018269 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 20502155513050 in words is "twenty trillion, five hundred two billion, one hundred fifty-five million, five hundred thirteen thousand, fifty".