21621476132 has 96 divisors (see below), whose sum is σ = 41876889600. Its totient is φ = 9729331200.

The previous prime is 21621476083. The next prime is 21621476137. The reversal of 21621476132 is 23167412612.

It is a junction number, because it is equal to n+sod(n) for n = 21621476092 and 21621476101.

It is not an unprimeable number, because it can be changed into a prime (21621476137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33730532 + ... + 33731172.

It is an arithmetic number, because the mean of its divisors is an integer number (436217600).

Almost surely, 2^21621476132 is an apocalyptic number.

It is an amenable number.

21621476132 is a deficient number, since it is larger than the sum of its proper divisors (20255413468).

21621476132 is a wasteful number, since it uses less digits than its factorization.

21621476132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

Adding to 21621476132 its reverse (23167412612), we get a palindrome (44788888744).

The spelling of 21621476132 in words is "twenty-one billion, six hundred twenty-one million, four hundred seventy-six thousand, one hundred thirty-two".