21062523824 has 20 divisors (see below), whose sum is σ = 40811283000. Its totient is φ = 10530579840.

The previous prime is 21062523821. The next prime is 21062523851. The reversal of 21062523824 is 42832526012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21062523821) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 291479 + ... + 356489.

It is an arithmetic number, because the mean of its divisors is an integer number (2040564150).

Almost surely, 2^21062523824 is an apocalyptic number.

It is an amenable number.

21062523824 is a deficient number, since it is larger than the sum of its proper divisors (19748759176).

21062523824 is a wasteful number, since it uses less digits than its factorization.

21062523824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85268 (or 85262 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 21062523824 in words is "twenty-one billion, sixty-two million, five hundred twenty-three thousand, eight hundred twenty-four".