20144466 has 24 divisors (see below), whose sum is σ = 43905420. Its totient is φ = 6674976.

The previous prime is 20144461. The next prime is 20144471. The reversal of 20144466 is 66444102.

It is an interprime number because it is at equal distance from previous prime (20144461) and next prime (20144471).

It can be written as a sum of positive squares in 2 ways, for example, as 20115225 + 29241 = 4485^2 + 171^2 .

It is not an unprimeable number, because it can be changed into a prime (20144461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121 + ... + 6348.

Almost surely, 2^20144466 is an apocalyptic number.

20144466 is an abundant number, since it is smaller than the sum of its proper divisors (23760954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20144466 is a wasteful number, since it uses less digits than its factorization.

20144466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650 (or 6647 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20144466 is about 4488.2586823845. The cubic root of 20144466 is about 272.0937627296.

Adding to 20144466 its reverse (66444102), we get a palindrome (86588568).

The spelling of 20144466 in words is "twenty million, one hundred forty-four thousand, four hundred sixty-six".