23201210320 has 20 divisors (see below), whose sum is σ = 53942814180. Its totient is φ = 9280484096.

The previous prime is 23201210317. The next prime is 23201210363. The reversal of 23201210320 is 2301210232.

It can be written as a sum of positive squares in 2 ways, for example, as 2661734464 + 20539475856 = 51592^2 + 143316^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 23201210294 and 23201210303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145007485 + ... + 145007644.

It is an arithmetic number, because the mean of its divisors is an integer number (2697140709).

Almost surely, 2^23201210320 is an apocalyptic number.

23201210320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23201210320 is an abundant number, since it is smaller than the sum of its proper divisors (30741603860).

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

23201210320 is a wasteful number, since it uses less digits than its factorization.

23201210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290015142 (or 290015136 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23201210320 its reverse (2301210232), we get a palindrome (25502420552).

The spelling of 23201210320 in words is "twenty-three billion, two hundred one million, two hundred ten thousand, three hundred twenty".