20126117 has 4 divisors (see below), whose sum is σ = 21955776. Its totient is φ = 18296460.

The previous prime is 20126101. The next prime is 20126129. The reversal of 20126117 is 71162102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20126117 - 2⁴ = 20126101 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 (20126137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914813 + ... + 914834.

It is an arithmetic number, because the mean of its divisors is an integer number (5488944).

Almost surely, 2^20126117 is an apocalyptic number.

It is an amenable number.

20126117 is a deficient number, since it is larger than the sum of its proper divisors (1829659).

20126117 is a wasteful number, since it uses less digits than its factorization.

20126117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829658.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 20126117 is about 4486.2141054568. The cubic root of 20126117 is about 272.0111235719.

Adding to 20126117 its reverse (71162102), we get a palindrome (91288219).

The spelling of 20126117 in words is "twenty million, one hundred twenty-six thousand, one hundred seventeen".