20717126 has 16 divisors (see below), whose sum is σ = 31648320. Its totient is φ = 10169640.

The previous prime is 20717119. The next prime is 20717131. The reversal of 20717126 is 62171702.

It is a junction number, because it is equal to n+sod(n) for n = 20717095 and 20717104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27665 + ... + 28403.

It is an arithmetic number, because the mean of its divisors is an integer number (1978020).

Almost surely, 2^20717126 is an apocalyptic number.

20717126 is a deficient number, since it is larger than the sum of its proper divisors (10931194).

20717126 is a wasteful number, since it uses less digits than its factorization.

20717126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 20717126 is about 4551.6069689726. The cubic root of 20717126 is about 274.6480389882.

Adding to 20717126 its reverse (62171702), we get a palindrome (82888828).

The spelling of 20717126 in words is "twenty million, seven hundred seventeen thousand, one hundred twenty-six".