20144261 has 2 divisors, whose sum is σ = 20144262. Its totient is φ = 20144260.

The previous prime is 20144249. The next prime is 20144273. The reversal of 20144261 is 16244102.

It is a balanced prime because it is at equal distance from previous prime (20144249) and next prime (20144273).

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 4024036 = 4015^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 20144261 - 2¹⁸ = 19882117 is a prime.

It is a super-2 number, since 2×20144261² = 811582502472242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20144221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072130 + 10072131.

It is an arithmetic number, because the mean of its divisors is an integer number (10072131).

Almost surely, 2^20144261 is an apocalyptic number.

It is an amenable number.

20144261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144261 is an equidigital number, since it uses as much as digits as its factorization.

20144261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20144261 is about 4488.2358449618. The cubic root of 20144261 is about 272.0928397398.

Adding to 20144261 its reverse (16244102), we get a palindrome (36388363).

The spelling of 20144261 in words is "twenty million, one hundred forty-four thousand, two hundred sixty-one".