21375730306703 has 16 divisors (see below), whose sum is σ = 23047754496000. Its totient is φ = 19778962220640.

The previous prime is 21375730306661. The next prime is 21375730306717. The reversal of 21375730306703 is 30760303757312.

It is a cyclic number.

It is not a de Polignac number, because 21375730306703 - 2²⁰ = 21375729258127 is a prime.

It is a super-2 number, since 2×21375730306703² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375730306793) 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, 115330853 + ... + 115516046.

It is an arithmetic number, because the mean of its divisors is an integer number (1440484656000).

Almost surely, 2^{21375730306703} is an apocalyptic number.

21375730306703 is a deficient number, since it is larger than the sum of its proper divisors (1672024189297).

21375730306703 is a wasteful number, since it uses less digits than its factorization.

21375730306703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230847062.

The product of its (nonzero) digits is 1666980, while the sum is 47.

The spelling of 21375730306703 in words is "twenty-one trillion, three hundred seventy-five billion, seven hundred thirty million, three hundred six thousand, seven hundred three".