21340008735 has 16 divisors (see below), whose sum is σ = 34161561600. Its totient is φ = 11375488800.

The previous prime is 21340008709. The next prime is 21340008757. The reversal of 21340008735 is 53780004312.

It is not a de Polignac number, because 21340008735 - 2⁶ = 21340008671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21340008696 and 21340008705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335335 + ... + 393864.

It is an arithmetic number, because the mean of its divisors is an integer number (2135097600).

Almost surely, 2^21340008735 is an apocalyptic number.

21340008735 is a deficient number, since it is larger than the sum of its proper divisors (12821552865).

21340008735 is a wasteful number, since it uses less digits than its factorization.

21340008735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731158.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 21340008735 in words is "twenty-one billion, three hundred forty million, eight thousand, seven hundred thirty-five".