20731126 has 48 divisors (see below), whose sum is σ = 37134720. Its totient is φ = 8616960.

The previous prime is 20731121. The next prime is 20731127. The reversal of 20731126 is 62113702.

It is a junction number, because it is equal to n+sod(n) for n = 20731097 and 20731106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232890 + ... + 232978.

It is an arithmetic number, because the mean of its divisors is an integer number (773640).

Almost surely, 2^20731126 is an apocalyptic number.

20731126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20731126 is a deficient number, since it is larger than the sum of its proper divisors (16403594).

20731126 is a wasteful number, since it uses less digits than its factorization.

20731126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20731126 is about 4553.1446276173. The cubic root of 20731126 is about 274.7098913053.

Adding to 20731126 its reverse (62113702), we get a palindrome (82844828).

The spelling of 20731126 in words is "twenty million, seven hundred thirty-one thousand, one hundred twenty-six".