20534237 has 2 divisors, whose sum is σ = 20534238. Its totient is φ = 20534236.

The previous prime is 20534207. The next prime is 20534257. The reversal of 20534237 is 73243502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11689561 + 8844676 = 3419^2 + 2974^2 .

It is a cyclic number.

It is not a de Polignac number, because 20534237 - 2¹⁰ = 20533213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20534207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267118 + 10267119.

It is an arithmetic number, because the mean of its divisors is an integer number (10267119).

Almost surely, 2^20534237 is an apocalyptic number.

It is an amenable number.

20534237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20534237 is an equidigital number, since it uses as much as digits as its factorization.

20534237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 20534237 is about 4531.4718359491. The cubic root of 20534237 is about 273.8374593189.

Adding to 20534237 its reverse (73243502), we get a palindrome (93777739).

It can be divided in two parts, 205342 and 37, that added together give a cube (205379 = 59³).

The spelling of 20534237 in words is "twenty million, five hundred thirty-four thousand, two hundred thirty-seven".