20003684 has 24 divisors (see below), whose sum is σ = 35953848. Its totient is φ = 9734400.

The previous prime is 20003681. The next prime is 20003693. The reversal of 20003684 is 48630002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6150400 + 13853284 = 2480^2 + 3722^2 .

It is not an unprimeable number, because it can be changed into a prime (20003681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32984 + ... + 33584.

It is an arithmetic number, because the mean of its divisors is an integer number (1498077).

Almost surely, 2^20003684 is an apocalyptic number.

It is an amenable number.

20003684 is a deficient number, since it is larger than the sum of its proper divisors (15950164).

20003684 is a wasteful number, since it uses less digits than its factorization.

20003684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20003684 is about 4472.5478197555. The cubic root of 20003684 is about 271.4584271604.

Adding to 20003684 its reverse (48630002), we get a palindrome (68633686).

The spelling of 20003684 in words is "twenty million, three thousand, six hundred eighty-four".