21340008734 has 8 divisors (see below), whose sum is σ = 34920014328. Its totient is φ = 9700003960.

The previous prime is 21340008709. The next prime is 21340008757. The reversal of 21340008734 is 43780004312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21340008734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485000177 + ... + 485000220.

It is an arithmetic number, because the mean of its divisors is an integer number (4365001791).

Almost surely, 2^21340008734 is an apocalyptic number.

21340008734 is a deficient number, since it is larger than the sum of its proper divisors (13580005594).

21340008734 is a wasteful number, since it uses less digits than its factorization.

21340008734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970000410.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 21340008734 in words is "twenty-one billion, three hundred forty million, eight thousand, seven hundred thirty-four".