20005007 has 8 divisors (see below), whose sum is σ = 22356432. Its totient is φ = 17742400.

The previous prime is 20005003. The next prime is 20005021. The reversal of 20005007 is 70050002.

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 20005007 - 2² = 20005003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004982 and 20005000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005003) 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, 21728 + ... + 22629.

It is an arithmetic number, because the mean of its divisors is an integer number (2794554).

Almost surely, 2^20005007 is an apocalyptic number.

20005007 is a deficient number, since it is larger than the sum of its proper divisors (2351425).

20005007 is a wasteful number, since it uses less digits than its factorization.

20005007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44409.

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 20005007 is about 4472.6957195857. The cubic root of 20005007 is about 271.4644115845.

Adding to 20005007 its reverse (70050002), we get a palindrome (90055009).

It can be divided in two parts, 2000 and 5007, that added together give a palindrome (7007).

The spelling of 20005007 in words is "twenty million, five thousand, seven".