20126157 has 16 divisors (see below), whose sum is σ = 27676800. Its totient is φ = 13003200.

The previous prime is 20126153. The next prime is 20126159. The reversal of 20126157 is 75162102.

It is not a de Polignac number, because 20126157 - 2² = 20126153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126153) 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 15 ways as a sum of consecutive naturals, for example, 12219 + ... + 13767.

It is an arithmetic number, because the mean of its divisors is an integer number (1729800).

Almost surely, 2^20126157 is an apocalyptic number.

It is an amenable number.

20126157 is a deficient number, since it is larger than the sum of its proper divisors (7550643).

20126157 is a wasteful number, since it uses less digits than its factorization.

20126157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 20126157 is about 4486.2185635566. The cubic root of 20126157 is about 272.0113037762.

Adding to 20126157 its reverse (75162102), we get a palindrome (95288259).

The spelling of 20126157 in words is "twenty million, one hundred twenty-six thousand, one hundred fifty-seven".