20126239 has 8 divisors (see below), whose sum is σ = 23239328. Its totient is φ = 17072640.

The previous prime is 20126237. The next prime is 20126251. The reversal of 20126239 is 93262102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20126239 - 2¹ = 20126237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126231) by changing a digit.

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, 14142 + ... + 15499.

It is an arithmetic number, because the mean of its divisors is an integer number (2904916).

Almost surely, 2^20126239 is an apocalyptic number.

20126239 is a deficient number, since it is larger than the sum of its proper divisors (3113089).

20126239 is an equidigital number, since it uses as much as digits as its factorization.

20126239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29745.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20126239 is about 4486.2277026473. The cubic root of 20126239 is about 272.0116731942.

The spelling of 20126239 in words is "twenty million, one hundred twenty-six thousand, two hundred thirty-nine".