20024745 has 32 divisors (see below), whose sum is σ = 34874112. Its totient is φ = 9752832.

The previous prime is 20024699. The next prime is 20024747. The reversal of 20024745 is 54742002.

It is not a de Polignac number, because 20024745 - 2¹⁰ = 20023721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20024747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19587 + ... + 20583.

It is an arithmetic number, because the mean of its divisors is an integer number (1089816).

Almost surely, 2^20024745 is an apocalyptic number.

It is an amenable number.

20024745 is a deficient number, since it is larger than the sum of its proper divisors (14849367).

20024745 is a wasteful number, since it uses less digits than its factorization.

20024745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20024745 is about 4474.9016748974. The cubic root of 20024745 is about 271.5536626289.

Adding to 20024745 its reverse (54742002), we get a palindrome (74766747).

The spelling of 20024745 in words is "twenty million, twenty-four thousand, seven hundred forty-five".