20154230361 has 12 divisors (see below), whose sum is σ = 29194139988. Its totient is φ = 13398088704.

The previous prime is 20154230323. The next prime is 20154230377. The reversal of 20154230361 is 16303245102.

20154230361 is a `hidden beast` number, since 20 + 1 + 54 + 230 + 361 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10129214736 + 10025015625 = 100644^2 + 100125^2 .

It is not a de Polignac number, because 20154230361 - 2²⁵ = 20120675929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20154230321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3168720 + ... + 3175073.

It is an arithmetic number, because the mean of its divisors is an integer number (2432844999).

Almost surely, 2^20154230361 is an apocalyptic number.

It is an amenable number.

20154230361 is a deficient number, since it is larger than the sum of its proper divisors (9039909627).

20154230361 is a wasteful number, since it uses less digits than its factorization.

20154230361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344152 (or 6344149 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20154230361 its reverse (16303245102), we get a palindrome (36457475463).

The spelling of 20154230361 in words is "twenty billion, one hundred fifty-four million, two hundred thirty thousand, three hundred sixty-one".