21024414032 has 10 divisors (see below), whose sum is σ = 40734802218. Its totient is φ = 10512207008.

The previous prime is 21024414007. The next prime is 21024414043. The reversal of 21024414032 is 23041442012.

It can be written as a sum of positive squares in only one way, i.e., 20324494096 + 699919936 = 142564^2 + 26456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21024413989 and 21024414007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657012923 + ... + 657012954.

Almost surely, 2^21024414032 is an apocalyptic number.

It is an amenable number.

21024414032 is a deficient number, since it is larger than the sum of its proper divisors (19710388186).

21024414032 is a wasteful number, since it uses less digits than its factorization.

21024414032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314025885 (or 1314025879 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21024414032 its reverse (23041442012), we get a palindrome (44065856044).

The spelling of 21024414032 in words is "twenty-one billion, twenty-four million, four hundred fourteen thousand, thirty-two".