20050613 has 8 divisors (see below), whose sum is σ = 22182336. Its totient is φ = 17970400.

The previous prime is 20050609. The next prime is 20050631. The reversal of 20050613 is 31605002.

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 20050613 - 2² = 20050609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20050591 and 20050600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050603) 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, 12056 + ... + 13617.

It is an arithmetic number, because the mean of its divisors is an integer number (2772792).

Almost surely, 2^20050613 is an apocalyptic number.

It is an amenable number.

20050613 is a deficient number, since it is larger than the sum of its proper divisors (2131723).

20050613 is a wasteful number, since it uses less digits than its factorization.

20050613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25755.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20050613 is about 4477.7910848989. The cubic root of 20050613 is about 271.6705434770.

Adding to 20050613 its reverse (31605002), we get a palindrome (51655615).

The spelling of 20050613 in words is "twenty million, fifty thousand, six hundred thirteen".