20110404231 has 24 divisors (see below), whose sum is σ = 29606850000. Its totient is φ = 13150190592.

The previous prime is 20110404187. The next prime is 20110404247. The reversal of 20110404231 is 13240401102.

20110404231 is a `hidden beast` number, since 20 + 1 + 10 + 404 + 231 = 666.

It is not a de Polignac number, because 20110404231 - 2¹¹ = 20110402183 is a prime.

It is a super-2 number, since 2×20110404231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110404271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196245 + ... + 280593.

It is an arithmetic number, because the mean of its divisors is an integer number (1233618750).

Almost surely, 2^20110404231 is an apocalyptic number.

20110404231 is a deficient number, since it is larger than the sum of its proper divisors (9496445769).

20110404231 is a wasteful number, since it uses less digits than its factorization.

20110404231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84863 (or 84860 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20110404231 its reverse (13240401102), we get a palindrome (33350805333).

The spelling of 20110404231 in words is "twenty billion, one hundred ten million, four hundred four thousand, two hundred thirty-one".