20535004351 has 4 divisors (see below), whose sum is σ = 20535799792. Its totient is φ = 20534208912.

The previous prime is 20535004349. The next prime is 20535004379. The reversal of 20535004351 is 15340053502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20535004351 - 2¹ = 20535004349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535004381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357651 + ... + 411076.

It is an arithmetic number, because the mean of its divisors is an integer number (5133949948).

Almost surely, 2^20535004351 is an apocalyptic number.

20535004351 is a deficient number, since it is larger than the sum of its proper divisors (795441).

20535004351 is an equidigital number, since it uses as much as digits as its factorization.

20535004351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795440.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 20535004351 its reverse (15340053502), we get a palindrome (35875057853).

The spelling of 20535004351 in words is "twenty billion, five hundred thirty-five million, four thousand, three hundred fifty-one".