20487126 has 64 divisors (see below), whose sum is σ = 46884096. Its totient is φ = 5913600.

The previous prime is 20487119. The next prime is 20487157. The reversal of 20487126 is 62178402.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20487093 and 20487102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181246 + ... + 181358.

It is an arithmetic number, because the mean of its divisors is an integer number (732564).

Almost surely, 2^20487126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20487126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23442048).

20487126 is an abundant number, since it is smaller than the sum of its proper divisors (26396970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20487126 is a wasteful number, since it uses less digits than its factorization.

20487126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20487126 is about 4526.2706503257. The cubic root of 20487126 is about 273.6278803109.

The spelling of 20487126 in words is "twenty million, four hundred eighty-seven thousand, one hundred twenty-six".