20053230561 has 96 divisors (see below), whose sum is σ = 38034720000. Its totient is φ = 10212314112.

The previous prime is 20053230499. The next prime is 20053230563. The reversal of 20053230561 is 16503235002.

20053230561 is a `hidden beast` number, since 20 + 0 + 53 + 2 + 30 + 561 = 666.

It is not a de Polignac number, because 20053230561 - 2¹⁴ = 20053214177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20053230563) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 915465 + ... + 937113.

It is an arithmetic number, because the mean of its divisors is an integer number (396195000).

Almost surely, 2^20053230561 is an apocalyptic number.

20053230561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20053230561 is a deficient number, since it is larger than the sum of its proper divisors (17981489439).

20053230561 is a wasteful number, since it uses less digits than its factorization.

20053230561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720 (or 21701 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 20053230561 its reverse (16503235002), we get a palindrome (36556465563).

The spelling of 20053230561 in words is "twenty billion, fifty-three million, two hundred thirty thousand, five hundred sixty-one".