20053784 has 8 divisors (see below), whose sum is σ = 37600860. Its totient is φ = 10026888.

The previous prime is 20053783. The next prime is 20053793. The reversal of 20053784 is 48735002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20053783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253354 + ... + 1253369.

Almost surely, 2^20053784 is an apocalyptic number.

It is an amenable number.

20053784 is a deficient number, since it is larger than the sum of its proper divisors (17547076).

20053784 is a wasteful number, since it uses less digits than its factorization.

20053784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506729 (or 2506725 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20053784 is about 4478.1451517341. The cubic root of 20053784 is about 271.6848642675.

Adding to 20053784 its reverse (48735002), we get a palindrome (68788786).

The spelling of 20053784 in words is "twenty million, fifty-three thousand, seven hundred eighty-four".