21043152032 has 48 divisors (see below), whose sum is σ = 48053799360. Its totient is φ = 8883883008.

The previous prime is 21043152017. The next prime is 21043152049. The reversal of 21043152032 is 23025134012.

It is a junction number, because it is equal to n+sod(n) for n = 21043151989 and 21043152007.

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, 686057 + ... + 716072.

It is an arithmetic number, because the mean of its divisors is an integer number (1001120820).

Almost surely, 2^21043152032 is an apocalyptic number.

It is an amenable number.

21043152032 is an abundant number, since it is smaller than the sum of its proper divisors (27010647328).

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

21043152032 is a wasteful number, since it uses less digits than its factorization.

21043152032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402213 (or 1402205 counting only the distinct ones).

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

Adding to 21043152032 its reverse (23025134012), we get a palindrome (44068286044).

The spelling of 21043152032 in words is "twenty-one billion, forty-three million, one hundred fifty-two thousand, thirty-two".