21513424605 has 32 divisors (see below), whose sum is σ = 36591585408. Its totient is φ = 10755840000.

The previous prime is 21513424577. The next prime is 21513424619. The reversal of 21513424605 is 50642431512.

It is not a de Polignac number, because 21513424605 - 2⁷ = 21513424477 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 104056 + ... + 232065.

It is an arithmetic number, because the mean of its divisors is an integer number (1143487044).

Almost surely, 2^21513424605 is an apocalyptic number.

It is an amenable number.

21513424605 is a deficient number, since it is larger than the sum of its proper divisors (15078160803).

21513424605 is a wasteful number, since it uses less digits than its factorization.

21513424605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336397.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21513424605 in words is "twenty-one billion, five hundred thirteen million, four hundred twenty-four thousand, six hundred five".