21852857524 has 12 divisors (see below), whose sum is σ = 40255264000. Its totient is φ = 10351353528.

The previous prime is 21852857501. The next prime is 21852857531. The reversal of 21852857524 is 42575825812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143768724 + ... + 143768875.

Almost surely, 2^21852857524 is an apocalyptic number.

It is an amenable number.

21852857524 is a deficient number, since it is larger than the sum of its proper divisors (18402406476).

21852857524 is a wasteful number, since it uses less digits than its factorization.

21852857524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287537622 (or 287537620 counting only the distinct ones).

The product of its digits is 1792000, while the sum is 49.

The spelling of 21852857524 in words is "twenty-one billion, eight hundred fifty-two million, eight hundred fifty-seven thousand, five hundred twenty-four".