20523356061 has 8 divisors (see below), whose sum is σ = 29469434400. Its totient is φ = 12629757552.

The previous prime is 20523356059. The next prime is 20523356071. The reversal of 20523356061 is 16065332502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20523356061 - 2¹ = 20523356059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523356071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263119911 + ... + 263119988.

It is an arithmetic number, because the mean of its divisors is an integer number (3683679300).

Almost surely, 2^20523356061 is an apocalyptic number.

It is an amenable number.

20523356061 is a deficient number, since it is larger than the sum of its proper divisors (8946078339).

20523356061 is a wasteful number, since it uses less digits than its factorization.

20523356061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526239915.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 20523356061 its reverse (16065332502), we get a palindrome (36588688563).

The spelling of 20523356061 in words is "twenty billion, five hundred twenty-three million, three hundred fifty-six thousand, sixty-one".