20032334561 has 16 divisors (see below), whose sum is σ = 20449228800. Its totient is φ = 19620292608.

The previous prime is 20032334521. The next prime is 20032334563. The reversal of 20032334561 is 16543323002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20032334561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20032334563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11387600 + ... + 11389358.

It is an arithmetic number, because the mean of its divisors is an integer number (1278076800).

Almost surely, 2^20032334561 is an apocalyptic number.

It is an amenable number.

20032334561 is a deficient number, since it is larger than the sum of its proper divisors (416894239).

20032334561 is a wasteful number, since it uses less digits than its factorization.

20032334561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 20032334561 its reverse (16543323002), we get a palindrome (36575657563).

The spelling of 20032334561 in words is "twenty billion, thirty-two million, three hundred thirty-four thousand, five hundred sixty-one".