231302230020 has 192 divisors, whose sum is σ = 770321664000. Its totient is φ = 57443686272.

The previous prime is 231302230009. The next prime is 231302230037. The reversal of 231302230020 is 20032203132.

It is a happy number.

It is a super-2 number, since 2×231302230020² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231302229975 and 231302230002.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 414289 + ... + 796391.

It is an arithmetic number, because the mean of its divisors is an integer number (4012092000).

Almost surely, 2^231302230020 is an apocalyptic number.

231302230020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231302230020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385160832000).

231302230020 is an abundant number, since it is smaller than the sum of its proper divisors (539019433980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231302230020 is a wasteful number, since it uses less digits than its factorization.

231302230020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382199 (or 382191 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 231302230020 its reverse (20032203132), we get a palindrome (251334433152).

The spelling of 231302230020 in words is "two hundred thirty-one billion, three hundred two million, two hundred thirty thousand, twenty".