20052215 has 4 divisors (see below), whose sum is σ = 24062664. Its totient is φ = 16041768.

The previous prime is 20052211. The next prime is 20052223. The reversal of 20052215 is 51225002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20052215 - 2² = 20052211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20052193 and 20052202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20052211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005217 + ... + 2005226.

It is an arithmetic number, because the mean of its divisors is an integer number (6015666).

Almost surely, 2^20052215 is an apocalyptic number.

20052215 is a deficient number, since it is larger than the sum of its proper divisors (4010449).

20052215 is an equidigital number, since it uses as much as digits as its factorization.

20052215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010448.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20052215 is about 4477.9699641690. The cubic root of 20052215 is about 271.6777785779.

Adding to 20052215 its reverse (51225002), we get a palindrome (71277217).

The spelling of 20052215 in words is "twenty million, fifty-two thousand, two hundred fifteen".