23534220321 has 6 divisors (see below), whose sum is σ = 33993873810. Its totient is φ = 15689480208.

The previous prime is 23534220313. The next prime is 23534220323. The reversal of 23534220321 is 12302243532.

23534220321 is a `hidden beast` number, since 235 + 3 + 422 + 0 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23002272225 + 531948096 = 151665^2 + 23064^2 .

It is not a de Polignac number, because 23534220321 - 2³ = 23534220313 is a prime.

It is a super-2 number, since 2×23534220321² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23534220323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1307456676 + ... + 1307456693.

It is an arithmetic number, because the mean of its divisors is an integer number (5665645635).

Almost surely, 2^23534220321 is an apocalyptic number.

It is an amenable number.

23534220321 is a deficient number, since it is larger than the sum of its proper divisors (10459653489).

23534220321 is a wasteful number, since it uses less digits than its factorization.

23534220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614913375 (or 2614913372 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 23534220321 its reverse (12302243532), we get a palindrome (35836463853).

The spelling of 23534220321 in words is "twenty-three billion, five hundred thirty-four million, two hundred twenty thousand, three hundred twenty-one".