20100320231 has 2 divisors, whose sum is σ = 20100320232. Its totient is φ = 20100320230.

The previous prime is 20100320221. The next prime is 20100320281. The reversal of 20100320231 is 13202300102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100320231 - 2⁶ = 20100320167 is a prime.

It is a super-2 number, since 2×20100320231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050160115 + 10050160116.

It is an arithmetic number, because the mean of its divisors is an integer number (10050160116).

Almost surely, 2^20100320231 is an apocalyptic number.

20100320231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100320231 is an equidigital number, since it uses as much as digits as its factorization.

20100320231 is an evil number, because the sum of its binary digits is even.

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

Adding to 20100320231 its reverse (13202300102), we get a palindrome (33302620333).

The spelling of 20100320231 in words is "twenty billion, one hundred million, three hundred twenty thousand, two hundred thirty-one".