20044745 has 8 divisors (see below), whose sum is σ = 27489984. Its totient is φ = 13744944.

The previous prime is 20044723. The next prime is 20044747. The reversal of 20044745 is 54744002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20044745 - 2²⁰ = 18996169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20044747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286319 + ... + 286388.

It is an arithmetic number, because the mean of its divisors is an integer number (3436248).

Almost surely, 2^20044745 is an apocalyptic number.

It is an amenable number.

20044745 is a deficient number, since it is larger than the sum of its proper divisors (7445239).

20044745 is an equidigital number, since it uses as much as digits as its factorization.

20044745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572719.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 20044745 is about 4477.1358031670. The cubic root of 20044745 is about 271.6440385801.

Adding to 20044745 its reverse (54744002), we get a palindrome (74788747).

The spelling of 20044745 in words is "twenty million, forty-four thousand, seven hundred forty-five".