20144490 has 32 divisors (see below), whose sum is σ = 51192000. Its totient is φ = 5055744.

The previous prime is 20144479. The next prime is 20144497. The reversal of 20144490 is 9444102.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20144490.

It is not an unprimeable number, because it can be changed into a prime (20144497) 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, 19240 + ... + 20259.

It is an arithmetic number, because the mean of its divisors is an integer number (1599750).

Almost surely, 2^20144490 is an apocalyptic number.

20144490 is an abundant number, since it is smaller than the sum of its proper divisors (31047510).

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

20144490 is a wasteful number, since it uses less digits than its factorization.

20144490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39526.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20144490 is about 4488.2613560264. The cubic root of 20144490 is about 272.0938707865.

Adding to 20144490 its reverse (9444102), we get a palindrome (29588592).

The spelling of 20144490 in words is "twenty million, one hundred forty-four thousand, four hundred ninety".