20126249 has 24 divisors (see below), whose sum is σ = 25169088. Its totient is φ = 15863040.

The previous prime is 20126237. The next prime is 20126251. The reversal of 20126249 is 94262102.

It is not a de Polignac number, because 20126249 - 2⁸ = 20125993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20126209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41084 + ... + 41570.

It is an arithmetic number, because the mean of its divisors is an integer number (1048712).

Almost surely, 2^20126249 is an apocalyptic number.

It is an amenable number.

20126249 is a deficient number, since it is larger than the sum of its proper divisors (5042839).

20126249 is a wasteful number, since it uses less digits than its factorization.

20126249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20126249 is about 4486.2288171693. The cubic root of 20126249 is about 272.0117182451.

The spelling of 20126249 in words is "twenty million, one hundred twenty-six thousand, two hundred forty-nine".