21240524235 has 16 divisors (see below), whose sum is σ = 38839815936. Its totient is φ = 9709953888.

The previous prime is 21240524153. The next prime is 21240524243. The reversal of 21240524235 is 53242504212.

It is not a de Polignac number, because 21240524235 - 2⁹ = 21240523723 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101145249 + ... + 101145458.

It is an arithmetic number, because the mean of its divisors is an integer number (2427488496).

Almost surely, 2^21240524235 is an apocalyptic number.

21240524235 is a deficient number, since it is larger than the sum of its proper divisors (17599291701).

21240524235 is a wasteful number, since it uses less digits than its factorization.

21240524235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202290722.

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 21240524235 in words is "twenty-one billion, two hundred forty million, five hundred twenty-four thousand, two hundred thirty-five".