20531126 has 16 divisors (see below), whose sum is σ = 38396160. Its totient is φ = 7999080.

The previous prime is 20531107. The next prime is 20531171. The reversal of 20531126 is 62113502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20531098 and 20531107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66506 + ... + 66813.

It is an arithmetic number, because the mean of its divisors is an integer number (2399760).

Almost surely, 2^20531126 is an apocalyptic number.

20531126 is a deficient number, since it is larger than the sum of its proper divisors (17865034).

20531126 is a wasteful number, since it uses less digits than its factorization.

20531126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133339.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20531126 is about 4531.1285569933. The cubic root of 20531126 is about 273.8236295483.

Adding to 20531126 its reverse (62113502), we get a palindrome (82644628).

The spelling of 20531126 in words is "twenty million, five hundred thirty-one thousand, one hundred twenty-six".