20254161 has 16 divisors (see below), whose sum is σ = 27808704. Its totient is φ = 13105344.

The previous prime is 20254159. The next prime is 20254177. The reversal of 20254161 is 16145202.

It is not a de Polignac number, because 20254161 - 2¹ = 20254159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20254111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25015 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (1738044).

Almost surely, 2^20254161 is an apocalyptic number.

It is an amenable number.

20254161 is a deficient number, since it is larger than the sum of its proper divisors (7554543).

20254161 is a wasteful number, since it uses less digits than its factorization.

20254161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20254161 is about 4500.4623095855. The cubic root of 20254161 is about 272.5867568778.

Adding to 20254161 its reverse (16145202), we get a palindrome (36399363).

The spelling of 20254161 in words is "twenty million, two hundred fifty-four thousand, one hundred sixty-one".