20000120231 has 24 divisors (see below), whose sum is σ = 25588221120. Its totient is φ = 15487561152.

The previous prime is 20000120209. The next prime is 20000120243. The reversal of 20000120231 is 13202100002.

It is a happy number.

It is not a de Polignac number, because 20000120231 - 2⁶ = 20000120167 is a prime.

It is a super-2 number, since 2×20000120231² (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 (20000120131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304076 + ... + 363953.

It is an arithmetic number, because the mean of its divisors is an integer number (1066175880).

Almost surely, 2^20000120231 is an apocalyptic number.

20000120231 is a deficient number, since it is larger than the sum of its proper divisors (5588100889).

20000120231 is a wasteful number, since it uses less digits than its factorization.

20000120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668103 (or 668096 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20000120231 its reverse (13202100002), we get a palindrome (33202220233).

The spelling of 20000120231 in words is "twenty billion, one hundred twenty thousand, two hundred thirty-one".