20164265 has 16 divisors (see below), whose sum is σ = 26485056. Its totient is φ = 14616000.

The previous prime is 20164259. The next prime is 20164267. The reversal of 20164265 is 56246102.

It is not a de Polignac number, because 20164265 - 2¹² = 20160169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164267) 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, 28415 + ... + 29115.

It is an arithmetic number, because the mean of its divisors is an integer number (1655316).

Almost surely, 2^20164265 is an apocalyptic number.

It is an amenable number.

20164265 is a deficient number, since it is larger than the sum of its proper divisors (6320791).

20164265 is a wasteful number, since it uses less digits than its factorization.

20164265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20164265 is about 4490.4637845105. The cubic root of 20164265 is about 272.1828760447.

The spelling of 20164265 in words is "twenty million, one hundred sixty-four thousand, two hundred sixty-five".