20782661300144 has 40 divisors (see below), whose sum is σ = 40534963998048. Its totient is φ = 10322031859200.

The previous prime is 20782661300123. The next prime is 20782661300227. The reversal of 20782661300144 is 44100316628702.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20782661300095 and 20782661300104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54646454 + ... + 55025450.

Almost surely, 2^{20782661300144} is an apocalyptic number.

It is an amenable number.

20782661300144 is a deficient number, since it is larger than the sum of its proper divisors (19752302697904).

20782661300144 is a wasteful number, since it uses less digits than its factorization.

20782661300144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401853 (or 401847 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

Adding to 20782661300144 its reverse (44100316628702), we get a palindrome (64882977928846).

The spelling of 20782661300144 in words is "twenty trillion, seven hundred eighty-two billion, six hundred sixty-one million, three hundred thousand, one hundred forty-four".