20008755 has 48 divisors (see below), whose sum is σ = 38561760. Its totient is φ = 9839232.

The previous prime is 20008721. The next prime is 20008759. The reversal of 20008755 is 55780002.

It is a happy number.

It is not a de Polignac number, because 20008755 - 2⁹ = 20008243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20008759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22377 + ... + 23253.

It is an arithmetic number, because the mean of its divisors is an integer number (803370).

Almost surely, 2^20008755 is an apocalyptic number.

20008755 is a deficient number, since it is larger than the sum of its proper divisors (18553005).

20008755 is a wasteful number, since it uses less digits than its factorization.

20008755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 20008755 is about 4473.1146866585. The cubic root of 20008755 is about 271.4813637585.

Adding to 20008755 its reverse (55780002), we get a palindrome (75788757).

The spelling of 20008755 in words is "twenty million, eight thousand, seven hundred fifty-five".