21024441432 has 64 divisors (see below), whose sum is σ = 58472172000. Its totient is φ = 6999633792.

The previous prime is 21024441421. The next prime is 21024441499. The reversal of 21024441432 is 23414442012.

21024441432 is a `hidden beast` number, since 2 + 1 + 0 + 244 + 414 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21024441396 and 21024441405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120358 + ... + 237770.

Almost surely, 2^21024441432 is an apocalyptic number.

It is an amenable number.

21024441432 is an abundant number, since it is smaller than the sum of its proper divisors (37447730568).

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

21024441432 is a wasteful number, since it uses less digits than its factorization.

21024441432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118257 (or 118247 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21024441432 its reverse (23414442012), we get a palindrome (44438883444).

The spelling of 21024441432 in words is "twenty-one billion, twenty-four million, four hundred forty-one thousand, four hundred thirty-two".