20040606 has 24 divisors (see below), whose sum is σ = 44596344. Its totient is φ = 6499440.

The previous prime is 20040583. The next prime is 20040619. The reversal of 20040606 is 60604002.

20040606 is a `hidden beast` number, since 20 + 0 + 40 + 606 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14380 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (1858181).

Almost surely, 2^20040606 is an apocalyptic number.

20040606 is an abundant number, since it is smaller than the sum of its proper divisors (24555738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20040606 is a wasteful number, since it uses less digits than its factorization.

20040606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30136 (or 30133 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20040606 is about 4476.6735418165. The cubic root of 20040606 is about 271.6253402119.

Adding to 20040606 its reverse (60604002), we get a palindrome (80644608).

The spelling of 20040606 in words is "twenty million, forty thousand, six hundred six".