20530505051 has 6 divisors (see below), whose sum is σ = 23882424300. Its totient is φ = 17597575716.

The previous prime is 20530505041. The next prime is 20530505057. The reversal of 20530505051 is 15050503502.

It is not a de Polignac number, because 20530505051 - 2³⁴ = 3350635867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20530505051.

It is not an unprimeable number, because it can be changed into a prime (20530505057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209494901 + ... + 209494998.

It is an arithmetic number, because the mean of its divisors is an integer number (3980404050).

Almost surely, 2^20530505051 is an apocalyptic number.

20530505051 is a deficient number, since it is larger than the sum of its proper divisors (3351919249).

20530505051 is an equidigital number, since it uses as much as digits as its factorization.

20530505051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418989913 (or 418989906 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The spelling of 20530505051 in words is "twenty billion, five hundred thirty million, five hundred five thousand, fifty-one".