21243524510 has 64 divisors (see below), whose sum is σ = 42077448000. Its totient is φ = 7674365952.

The previous prime is 21243524509. The next prime is 21243524527. The reversal of 21243524510 is 1542534212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1289606 + ... + 1305974.

It is an arithmetic number, because the mean of its divisors is an integer number (657460125).

Almost surely, 2^21243524510 is an apocalyptic number.

21243524510 is a deficient number, since it is larger than the sum of its proper divisors (20833923490).

21243524510 is a wasteful number, since it uses less digits than its factorization.

21243524510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 21243524510 in words is "twenty-one billion, two hundred forty-three million, five hundred twenty-four thousand, five hundred ten".