20150205 has 16 divisors (see below), whose sum is σ = 32365824. Its totient is φ = 10704960.

The previous prime is 20150197. The next prime is 20150227. The reversal of 20150205 is 50205102.

It is not a de Polignac number, because 20150205 - 2³ = 20150197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1587 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (2022864).

Almost surely, 2^20150205 is an apocalyptic number.

It is an amenable number.

20150205 is a deficient number, since it is larger than the sum of its proper divisors (12215619).

20150205 is a wasteful number, since it uses less digits than its factorization.

20150205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20150205 is about 4488.8979716630. The cubic root of 20150205 is about 272.1195994008.

Adding to 20150205 its reverse (50205102), we get a palindrome (70355307).

The spelling of 20150205 in words is "twenty million, one hundred fifty thousand, two hundred five".