20110320231 has 4 divisors (see below), whose sum is σ = 26813760312. Its totient is φ = 13406880152.

The previous prime is 20110320163. The next prime is 20110320239. The reversal of 20110320231 is 13202301102.

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 20110320231 - 2¹⁴ = 20110303847 is a prime.

It is a super-2 number, since 2×20110320231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20110320231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110320239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351720036 + ... + 3351720041.

It is an arithmetic number, because the mean of its divisors is an integer number (6703440078).

Almost surely, 2^20110320231 is an apocalyptic number.

20110320231 is a deficient number, since it is larger than the sum of its proper divisors (6703440081).

20110320231 is an equidigital number, since it uses as much as digits as its factorization.

20110320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703440080.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20110320231 its reverse (13202301102), we get a palindrome (33312621333).

The spelling of 20110320231 in words is "twenty billion, one hundred ten million, three hundred twenty thousand, two hundred thirty-one".