21230322152 has 24 divisors (see below), whose sum is σ = 43104465990. Its totient is φ = 9798609600.

The previous prime is 21230322149. The next prime is 21230322181. The reversal of 21230322152 is 25122303212.

It can be written as a sum of positive squares in 3 ways, for example, as 16613663236 + 4616658916 = 128894^2 + 67946^2 .

It is a super-2 number, since 2×21230322152² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7850099 + ... + 7852802.

Almost surely, 2^21230322152 is an apocalyptic number.

It is an amenable number.

21230322152 is an abundant number, since it is smaller than the sum of its proper divisors (21874143838).

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

21230322152 is a wasteful number, since it uses less digits than its factorization.

21230322152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15702933 (or 15702916 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21230322152 its reverse (25122303212), we get a palindrome (46352625364).

The spelling of 21230322152 in words is "twenty-one billion, two hundred thirty million, three hundred twenty-two thousand, one hundred fifty-two".