21839257528 has 32 divisors (see below), whose sum is σ = 46613439360. Its totient is φ = 9495328480.

The previous prime is 21839257483. The next prime is 21839257537. The reversal of 21839257528 is 82575293812.

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, 5393050 + ... + 5397097.

It is an arithmetic number, because the mean of its divisors is an integer number (1456669980).

Almost surely, 2^21839257528 is an apocalyptic number.

It is an amenable number.

21839257528 is an abundant number, since it is smaller than the sum of its proper divisors (24774181832).

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

21839257528 is a wasteful number, since it uses less digits than its factorization.

21839257528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10790187 (or 10790183 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The spelling of 21839257528 in words is "twenty-one billion, eight hundred thirty-nine million, two hundred fifty-seven thousand, five hundred twenty-eight".