20715126 has 16 divisors (see below), whose sum is σ = 41858544. Its totient is φ = 6833664.

The previous prime is 20715113. The next prime is 20715169. The reversal of 20715126 is 62151702.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20715096 and 20715105.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17215 + ... + 18378.

It is an arithmetic number, because the mean of its divisors is an integer number (2616159).

Almost surely, 2^20715126 is an apocalyptic number.

20715126 is an abundant number, since it is smaller than the sum of its proper divisors (21143418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20715126 is a wasteful number, since it uses less digits than its factorization.

20715126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35695.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 20715126 is about 4551.3872610447. The cubic root of 20715126 is about 274.6392006684.

Adding to 20715126 its reverse (62151702), we get a palindrome (82866828).

The spelling of 20715126 in words is "twenty million, seven hundred fifteen thousand, one hundred twenty-six".