20034645 has 16 divisors (see below), whose sum is σ = 33743040. Its totient is φ = 10122624.

The previous prime is 20034629. The next prime is 20034647. The reversal of 20034645 is 54643002.

It is not a de Polignac number, because 20034645 - 2⁴ = 20034629 is a prime.

It is a super-4 number, since 4×20034645⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20034647) 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, 34864 + ... + 35433.

It is an arithmetic number, because the mean of its divisors is an integer number (2108940).

Almost surely, 2^20034645 is an apocalyptic number.

It is an amenable number.

20034645 is a deficient number, since it is larger than the sum of its proper divisors (13708395).

20034645 is a wasteful number, since it uses less digits than its factorization.

20034645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70324.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20034645 is about 4476.0077077682. The cubic root of 20034645 is about 271.5984062423.

Adding to 20034645 its reverse (54643002), we get a palindrome (74677647).

The spelling of 20034645 in words is "twenty million, thirty-four thousand, six hundred forty-five".