20320001231 has 16 divisors (see below), whose sum is σ = 21714739200. Its totient is φ = 18959796000.

The previous prime is 20320001209. The next prime is 20320001293. The reversal of 20320001231 is 13210002302.

It is a happy number.

It is not a de Polignac number, because 20320001231 - 2⁶ = 20320001167 is a prime.

It is a super-2 number, since 2×20320001231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320001831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338810 + ... + 394248.

It is an arithmetic number, because the mean of its divisors is an integer number (1357171200).

Almost surely, 2^20320001231 is an apocalyptic number.

20320001231 is a deficient number, since it is larger than the sum of its proper divisors (1394737969).

20320001231 is a wasteful number, since it uses less digits than its factorization.

20320001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55750.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20320001231 its reverse (13210002302), we get a palindrome (33530003533).

The spelling of 20320001231 in words is "twenty billion, three hundred twenty million, one thousand, two hundred thirty-one".