20122165 has 16 divisors (see below), whose sum is σ = 27885312. Its totient is φ = 13653504.

The previous prime is 20122153. The next prime is 20122199. The reversal of 20122165 is 56122102.

It is a cyclic number.

It is not a de Polignac number, because 20122165 - 2⁵ = 20122133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832).

Almost surely, 2^20122165 is an apocalyptic number.

It is an amenable number.

20122165 is a deficient number, since it is larger than the sum of its proper divisors (7763147).

20122165 is an equidigital number, since it uses as much as digits as its factorization.

20122165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20122165 is about 4485.7736233564. The cubic root of 20122165 is about 271.9933182110.

Adding to 20122165 its reverse (56122102), we get a palindrome (76244267).

It can be divided in two parts, 201 and 22165, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 20122165 in words is "twenty million, one hundred twenty-two thousand, one hundred sixty-five".