23420021320 has 16 divisors (see below), whose sum is σ = 52695048060. Its totient is φ = 9368008512.

The previous prime is 23420021227. The next prime is 23420021327. The reversal of 23420021320 is 2312002432.

It can be written as a sum of positive squares in 2 ways, for example, as 22765377924 + 654643396 = 150882^2 + 25586^2 .

It is not an unprimeable number, because it can be changed into a prime (23420021327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292750227 + ... + 292750306.

Almost surely, 2^23420021320 is an apocalyptic number.

23420021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23420021320 is an abundant number, since it is smaller than the sum of its proper divisors (29275026740).

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

23420021320 is a wasteful number, since it uses less digits than its factorization.

23420021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585500544 (or 585500540 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 23420021320 its reverse (2312002432), we get a palindrome (25732023752).

The spelling of 23420021320 in words is "twenty-three billion, four hundred twenty million, twenty-one thousand, three hundred twenty".