20109476 has 12 divisors (see below), whose sum is σ = 35348208. Its totient is φ = 10009992.

The previous prime is 20109451. The next prime is 20109491. The reversal of 20109476 is 67490102.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10166 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (2945684).

Almost surely, 2^20109476 is an apocalyptic number.

It is an amenable number.

20109476 is a deficient number, since it is larger than the sum of its proper divisors (15238732).

20109476 is a wasteful number, since it uses less digits than its factorization.

20109476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22378 (or 22376 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20109476 is about 4484.3590400413. The cubic root of 20109476 is about 271.9361333614.

Adding to 20109476 its reverse (67490102), we get a palindrome (87599578).

The spelling of 20109476 in words is "twenty million, one hundred nine thousand, four hundred seventy-six".