20124445 has 16 divisors (see below), whose sum is σ = 26443008. Its totient is φ = 14581440.

The previous prime is 20124437. The next prime is 20124457. The reversal of 20124445 is 54442102.

It is a happy number.

It is not a de Polignac number, because 20124445 - 2³ = 20124437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19687 + ... + 20683.

It is an arithmetic number, because the mean of its divisors is an integer number (1652688).

Almost surely, 2^20124445 is an apocalyptic number.

It is an amenable number.

20124445 is a deficient number, since it is larger than the sum of its proper divisors (6318563).

20124445 is a wasteful number, since it uses less digits than its factorization.

20124445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 20124445 is about 4486.0277529235. The cubic root of 20124445 is about 272.0035908191.

Adding to 20124445 its reverse (54442102), we get a palindrome (74566547).

The spelling of 20124445 in words is "twenty million, one hundred twenty-four thousand, four hundred forty-five".