21471120232 has 16 divisors (see below), whose sum is σ = 40505336640. Its totient is φ = 10669697136.

The previous prime is 21471120191. The next prime is 21471120257. The reversal of 21471120232 is 23202117412.

It is a super-2 number, since 2×21471120232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21471120197 and 21471120206.

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, 8231488 + ... + 8234095.

It is an arithmetic number, because the mean of its divisors is an integer number (2531583540).

Almost surely, 2^21471120232 is an apocalyptic number.

It is an amenable number.

21471120232 is a deficient number, since it is larger than the sum of its proper divisors (19034216408).

21471120232 is a wasteful number, since it uses less digits than its factorization.

21471120232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16465752 (or 16465748 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21471120232 its reverse (23202117412), we get a palindrome (44673237644).

The spelling of 21471120232 in words is "twenty-one billion, four hundred seventy-one million, one hundred twenty thousand, two hundred thirty-two".