21641321032 has 32 divisors (see below), whose sum is σ = 40786099200. Its totient is φ = 10765099584.

The previous prime is 21641321029. The next prime is 21641321041. The reversal of 21641321032 is 23012314612.

It is a junction number, because it is equal to n+sod(n) for n = 21641320988 and 21641321006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3070969 + ... + 3078007.

It is an arithmetic number, because the mean of its divisors is an integer number (1274565600).

Almost surely, 2^21641321032 is an apocalyptic number.

It is an amenable number.

21641321032 is a deficient number, since it is larger than the sum of its proper divisors (19144778168).

21641321032 is a wasteful number, since it uses less digits than its factorization.

21641321032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965 (or 8961 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21641321032 its reverse (23012314612), we get a palindrome (44653635644).

The spelling of 21641321032 in words is "twenty-one billion, six hundred forty-one million, three hundred twenty-one thousand, thirty-two".