21365041704103 has 16 divisors (see below), whose sum is σ = 22025154483360. Its totient is φ = 20716815015936.

The previous prime is 21365041704089. The next prime is 21365041704121. The reversal of 21365041704103 is 30140714056312.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21365041704103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365041704163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7148826 + ... + 9686887.

It is an arithmetic number, because the mean of its divisors is an integer number (1376572155210).

Almost surely, 2^{21365041704103} is an apocalyptic number.

21365041704103 is a deficient number, since it is larger than the sum of its proper divisors (660112779257).

21365041704103 is a wasteful number, since it uses less digits than its factorization.

21365041704103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16836066.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 21365041704103 in words is "twenty-one trillion, three hundred sixty-five billion, forty-one million, seven hundred four thousand, one hundred three".