20152005 has 8 divisors (see below), whose sum is σ = 32243232. Its totient is φ = 10747728.

The previous prime is 20151991. The next prime is 20152019. The reversal of 20152005 is 50025102.

It is an interprime number because it is at equal distance from previous prime (20151991) and next prime (20152019).

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

It is not a de Polignac number, because 20152005 - 2⁵ = 20151973 is a prime.

It is a super-2 number, since 2×20152005² = 812206611040050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1343467 = 20152005 / (2 + 0 + 1 + 5 + 2 + 0 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671719 + ... + 671748.

It is an arithmetic number, because the mean of its divisors is an integer number (4030404).

Almost surely, 2^20152005 is an apocalyptic number.

It is an amenable number.

20152005 is a deficient number, since it is larger than the sum of its proper divisors (12091227).

20152005 is a wasteful number, since it uses less digits than its factorization.

20152005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343475.

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

The square root of 20152005 is about 4489.0984618295. The cubic root of 20152005 is about 272.1277018940.

Adding to 20152005 its reverse (50025102), we get a palindrome (70177107).

The spelling of 20152005 in words is "twenty million, one hundred fifty-two thousand, five".