21004424152 has 32 divisors (see below), whose sum is σ = 42885630000. Its totient is φ = 9606377088.

The previous prime is 21004424131. The next prime is 21004424179. The reversal of 21004424152 is 25142440012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2378127 + ... + 2386942.

Almost surely, 2^21004424152 is an apocalyptic number.

It is an amenable number.

21004424152 is an abundant number, since it is smaller than the sum of its proper divisors (21881205848).

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

21004424152 is a wasteful number, since it uses less digits than its factorization.

21004424152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765123 (or 4765119 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21004424152 its reverse (25142440012), we get a palindrome (46146864164).

The spelling of 21004424152 in words is "twenty-one billion, four million, four hundred twenty-four thousand, one hundred fifty-two".