20000005 has 8 divisors (see below), whose sum is σ = 24585624. Its totient is φ = 15609600.

The previous prime is 20000003. The next prime is 20000023. The reversal of 20000005 is 50000002.

It can be written as a sum of positive squares in 4 ways, for example, as 1147041 + 18852964 = 1071^2 + 4342^2 .

It is a sliding number, since 20000005 = 5 + 20000000 and 1/5 + 1/20000000 = 0.20000005.

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

It is not a de Polignac number, because 20000005 - 2¹ = 20000003 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 (20000003) 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, 48576 + ... + 48985.

It is an arithmetic number, because the mean of its divisors is an integer number (3073203).

Almost surely, 2^20000005 is an apocalyptic number.

It is an amenable number.

20000005 is a deficient number, since it is larger than the sum of its proper divisors (4585619).

20000005 is an equidigital number, since it uses as much as digits as its factorization.

20000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97607.

The product of its (nonzero) digits is 10, while the sum is 7.

The square root of 20000005 is about 4472.1365140165. The cubic root of 20000005 is about 271.4417842796.

Adding to 20000005 its reverse (50000002), we get a palindrome (70000007).

It can be divided in two parts, 2000000 and 5, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 20000005 in words is "twenty million, five", and thus it is an aban number and an uban number.