20710345 has 16 divisors (see below), whose sum is σ = 25411968. Its totient is φ = 16199680.

The previous prime is 20710331. The next prime is 20710367. The reversal of 20710345 is 54301702.

It is not a de Polignac number, because 20710345 - 2⁹ = 20709833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80457 + ... + 80713.

It is an arithmetic number, because the mean of its divisors is an integer number (1588248).

Almost surely, 2^20710345 is an apocalyptic number.

It is an amenable number.

20710345 is a deficient number, since it is larger than the sum of its proper divisors (4701623).

20710345 is a wasteful number, since it uses less digits than its factorization.

20710345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20710345 is about 4550.8620062577. The cubic root of 20710345 is about 274.6180703593.

It can be divided in two parts, 207 and 10345, that multiplied together give a triangular number (2141415 = T₂₀₆₉).

The spelling of 20710345 in words is "twenty million, seven hundred ten thousand, three hundred forty-five".