20166253 has 4 divisors (see below), whose sum is σ = 20194720. Its totient is φ = 20137788.

The previous prime is 20166247. The next prime is 20166287. The reversal of 20166253 is 35266102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20166253 - 2⁹ = 20165741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13143 + ... + 14596.

It is an arithmetic number, because the mean of its divisors is an integer number (5048680).

Almost surely, 2^20166253 is an apocalyptic number.

It is an amenable number.

20166253 is a deficient number, since it is larger than the sum of its proper divisors (28467).

20166253 is an equidigital number, since it uses as much as digits as its factorization.

20166253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28466.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20166253 is about 4490.6851370364. The cubic root of 20166253 is about 272.1918206103.

The spelling of 20166253 in words is "twenty million, one hundred sixty-six thousand, two hundred fifty-three".