20701707 has 16 divisors (see below), whose sum is σ = 30686208. Its totient is φ = 12327840.

The previous prime is 20701691. The next prime is 20701711. The reversal of 20701707 is 70710702.

It is not a de Polignac number, because 20701707 - 2⁴ = 20701691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20701717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7353 + ... + 9770.

It is an arithmetic number, because the mean of its divisors is an integer number (1917888).

Almost surely, 2^20701707 is an apocalyptic number.

20701707 is a deficient number, since it is larger than the sum of its proper divisors (9984501).

20701707 is a wasteful number, since it uses less digits than its factorization.

20701707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17170.

The product of its (nonzero) digits is 686, while the sum is 24.

The square root of 20701707 is about 4549.9128563083. The cubic root of 20701707 is about 274.5798852435.

The spelling of 20701707 in words is "twenty million, seven hundred one thousand, seven hundred seven".