20034865 has 16 divisors (see below), whose sum is σ = 24590160. Its totient is φ = 15667200.

The previous prime is 20034841. The next prime is 20034869. The reversal of 20034865 is 56843002.

It can be written as a sum of positive squares in 8 ways, for example, as 3640464 + 16394401 = 1908^2 + 4049^2 .

It is not a de Polignac number, because 20034865 - 2¹³ = 20026673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20034869) 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, 48781 + ... + 49189.

It is an arithmetic number, because the mean of its divisors is an integer number (1536885).

Almost surely, 2^20034865 is an apocalyptic number.

It is an amenable number.

20034865 is a deficient number, since it is larger than the sum of its proper divisors (4555295).

20034865 is a wasteful number, since it uses less digits than its factorization.

20034865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20034865 is about 4476.0322831722. The cubic root of 20034865 is about 271.5994003774.

Adding to 20034865 its reverse (56843002), we get a palindrome (76877867).

The spelling of 20034865 in words is "twenty million, thirty-four thousand, eight hundred sixty-five".