20008470 has 32 divisors (see below), whose sum is σ = 48140640. Its totient is φ = 5322240.

The previous prime is 20008447. The next prime is 20008477. The reversal of 20008470 is 7480002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20008477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19326 + ... + 20334.

It is an arithmetic number, because the mean of its divisors is an integer number (1504395).

Almost surely, 2^20008470 is an apocalyptic number.

20008470 is an abundant number, since it is smaller than the sum of its proper divisors (28132170).

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

20008470 is a wasteful number, since it uses less digits than its factorization.

20008470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20008470 is about 4473.0828295483. The cubic root of 20008470 is about 271.4800747802.

Adding to 20008470 its reverse (7480002), we get a palindrome (27488472).

The spelling of 20008470 in words is "twenty million, eight thousand, four hundred seventy".