20555114231 has 4 divisors (see below), whose sum is σ = 21218182464. Its totient is φ = 19892046000.

The previous prime is 20555114207. The next prime is 20555114243. The reversal of 20555114231 is 13241155502.

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 20555114231 - 2³⁴ = 3375245047 is a prime.

It is a super-2 number, since 2×20555114231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20555114194 and 20555114203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555174231) 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 3 ways as a sum of consecutive naturals, for example, 331534070 + ... + 331534131.

It is an arithmetic number, because the mean of its divisors is an integer number (5304545616).

Almost surely, 2^20555114231 is an apocalyptic number.

20555114231 is a deficient number, since it is larger than the sum of its proper divisors (663068233).

20555114231 is an equidigital number, since it uses as much as digits as its factorization.

20555114231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663068232.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 20555114231 its reverse (13241155502), we get a palindrome (33796269733).

The spelling of 20555114231 in words is "twenty billion, five hundred fifty-five million, one hundred fourteen thousand, two hundred thirty-one".