21513540335 has 16 divisors (see below), whose sum is σ = 29574720000. Its totient is φ = 14716923936.

The previous prime is 21513540331. The next prime is 21513540379. The reversal of 21513540335 is 53304531512.

It is a cyclic number.

It is not a de Polignac number, because 21513540335 - 2² = 21513540331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513540331) by changing a digit.

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, 718835 + ... + 748164.

It is an arithmetic number, because the mean of its divisors is an integer number (1848420000).

Almost surely, 2^21513540335 is an apocalyptic number.

21513540335 is a deficient number, since it is larger than the sum of its proper divisors (8061179665).

21513540335 is a wasteful number, since it uses less digits than its factorization.

21513540335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467430.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 21513540335 in words is "twenty-one billion, five hundred thirteen million, five hundred forty thousand, three hundred thirty-five".