20055005 has 8 divisors (see below), whose sum is σ = 24143832. Its totient is φ = 15992128.

The previous prime is 20055001. The next prime is 20055017. The reversal of 20055005 is 50055002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1898884 + 18156121 = 1378^2 + 4261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20055005 - 2² = 20055001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (3017979).

Almost surely, 2^20055005 is an apocalyptic number.

It is an amenable number.

20055005 is a deficient number, since it is larger than the sum of its proper divisors (4088827).

20055005 is a wasteful number, since it uses less digits than its factorization.

20055005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12975.

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 20055005 is about 4478.2814784245. The cubic root of 20055005 is about 271.6903781145.

The spelling of 20055005 in words is "twenty million, fifty-five thousand, five".