20144782 has 12 divisors (see below), whose sum is σ = 35150760. Its totient is φ = 8633436.

The previous prime is 20144777. The next prime is 20144797. The reversal of 20144782 is 28744102.

It is a self number, because there is not a number n which added to its sum of digits gives 20144782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102682 + ... + 102877.

It is an arithmetic number, because the mean of its divisors is an integer number (2929230).

Almost surely, 2^20144782 is an apocalyptic number.

20144782 is a deficient number, since it is larger than the sum of its proper divisors (15005978).

20144782 is a wasteful number, since it uses less digits than its factorization.

20144782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205575 (or 205568 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20144782 is about 4488.2938852085. The cubic root of 20144782 is about 272.0951854723.

Adding to 20144782 its reverse (28744102), we get a palindrome (48888884).

The spelling of 20144782 in words is "twenty million, one hundred forty-four thousand, seven hundred eighty-two".