20711007 has 24 divisors (see below), whose sum is σ = 32514560. Its totient is φ = 12655440.

The previous prime is 20711003. The next prime is 20711029. The reversal of 20711007 is 70011702.

It is not a de Polignac number, because 20711007 - 2² = 20711003 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 (20711003) 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 23 ways as a sum of consecutive naturals, for example, 3348 + ... + 7254.

Almost surely, 2^20711007 is an apocalyptic number.

20711007 is a deficient number, since it is larger than the sum of its proper divisors (11803553).

20711007 is a wasteful number, since it uses less digits than its factorization.

20711007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963 (or 3960 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 20711007 is about 4550.9347391497. The cubic root of 20711007 is about 274.6209963563.

Adding to 20711007 its reverse (70011702), we get a palindrome (90722709).

The spelling of 20711007 in words is "twenty million, seven hundred eleven thousand, seven".