20045124 has 96 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 5928480.

The previous prime is 20045117. The next prime is 20045131. The reversal of 20045124 is 42154002.

It is an interprime number because it is at equal distance from previous prime (20045117) and next prime (20045131).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 20045097 and 20045106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55657 + ... + 56015.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^20045124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20045124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

20045124 is an abundant number, since it is smaller than the sum of its proper divisors (38015676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20045124 is a wasteful number, since it uses less digits than its factorization.

20045124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20045124 is about 4477.1781291345. The cubic root of 20045124 is about 271.6457506239.

Adding to 20045124 its reverse (42154002), we get a palindrome (62199126).

The spelling of 20045124 in words is "twenty million, forty-five thousand, one hundred twenty-four".