20842126 has 16 divisors (see below), whose sum is σ = 34045200. Its totient is φ = 9531648.

The previous prime is 20842093. The next prime is 20842127. The reversal of 20842126 is 62124802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20842126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8355 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (2127825).

Almost surely, 2^20842126 is an apocalyptic number.

20842126 is a deficient number, since it is larger than the sum of its proper divisors (13203074).

20842126 is a wasteful number, since it uses less digits than its factorization.

20842126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18963.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20842126 is about 4565.3177326447. The cubic root of 20842126 is about 275.1993089575.

Adding to 20842126 its reverse (62124802), we get a palindrome (82966928).

The spelling of 20842126 in words is "twenty million, eight hundred forty-two thousand, one hundred twenty-six".