20707005 has 16 divisors (see below), whose sum is σ = 36143424. Its totient is φ = 10039680.

The previous prime is 20706991. The next prime is 20707019. The reversal of 20707005 is 50070702.

It is an interprime number because it is at equal distance from previous prime (20706991) and next prime (20707019).

It is not a de Polignac number, because 20707005 - 2¹⁰ = 20705981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62584 + ... + 62913.

It is an arithmetic number, because the mean of its divisors is an integer number (2258964).

Almost surely, 2^20707005 is an apocalyptic number.

It is an amenable number.

20707005 is a deficient number, since it is larger than the sum of its proper divisors (15436419).

20707005 is a wasteful number, since it uses less digits than its factorization.

20707005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125516.

The product of its (nonzero) digits is 490, while the sum is 21.

The square root of 20707005 is about 4550.4950280162. The cubic root of 20707005 is about 274.6033068249.

Adding to 20707005 its reverse (50070702), we get a palindrome (70777707).

The spelling of 20707005 in words is "twenty million, seven hundred seven thousand, five".