20523300455231 has 16 divisors (see below), whose sum is σ = 24510826520064. Its totient is φ = 16801920557664.

The previous prime is 20523300455227. The next prime is 20523300455237. The reversal of 20523300455231 is 13255400332502.

It is a cyclic number.

It is not a de Polignac number, because 20523300455231 - 2² = 20523300455227 is a prime.

It is a super-2 number, since 2×20523300455231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20523300455191 and 20523300455200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523300455237) 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, 93209156 + ... + 93429081.

It is an arithmetic number, because the mean of its divisors is an integer number (1531926657504).

Almost surely, 2^{20523300455231} is an apocalyptic number.

20523300455231 is a deficient number, since it is larger than the sum of its proper divisors (3987526064833).

20523300455231 is a wasteful number, since it uses less digits than its factorization.

20523300455231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186638950.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 20523300455231 its reverse (13255400332502), we get a palindrome (33778700787733).

The spelling of 20523300455231 in words is "twenty trillion, five hundred twenty-three billion, three hundred million, four hundred fifty-five thousand, two hundred thirty-one".