20040208 has 20 divisors (see below), whose sum is σ = 39466348. Its totient is φ = 9855360.

The previous prime is 20040203. The next prime is 20040221. The reversal of 20040208 is 80204002.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 14047504 = 2448^2 + 3748^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20040191 and 20040200.

It is not an unprimeable number, because it can be changed into a prime (20040203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9291 + ... + 11242.

Almost surely, 2^20040208 is an apocalyptic number.

It is an amenable number.

20040208 is a deficient number, since it is larger than the sum of its proper divisors (19426140).

20040208 is a wasteful number, since it uses less digits than its factorization.

20040208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20602 (or 20596 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20040208 is about 4476.6290889463. The cubic root of 20040208 is about 271.6235420693.

The spelling of 20040208 in words is "twenty million, forty thousand, two hundred eight".