20152165 has 16 divisors (see below), whose sum is σ = 26997696. Its totient is φ = 14313600.

The previous prime is 20152159. The next prime is 20152169. The reversal of 20152165 is 56125102.

It is not a de Polignac number, because 20152165 - 2¹⁷ = 20021093 is a prime.

It is a super-2 number, since 2×20152165² = 812219508374450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (1687356).

Almost surely, 2^20152165 is an apocalyptic number.

It is an amenable number.

20152165 is a deficient number, since it is larger than the sum of its proper divisors (6845531).

20152165 is a wasteful number, since it uses less digits than its factorization.

20152165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 20152165 is about 4489.1162827443. The cubic root of 20152165 is about 272.1284220923.

Adding to 20152165 its reverse (56125102), we get a palindrome (76277267).

The spelling of 20152165 in words is "twenty million, one hundred fifty-two thousand, one hundred sixty-five".