20005440245 has 16 divisors (see below), whose sum is σ = 27439527168. Its totient is φ = 13716268800.

The previous prime is 20005440239. The next prime is 20005440253. The reversal of 20005440245 is 54204450002.

It is not a de Polignac number, because 20005440245 - 2¹⁴ = 20005423861 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, 281357 + ... + 345213.

It is an arithmetic number, because the mean of its divisors is an integer number (1714970448).

Almost surely, 2^20005440245 is an apocalyptic number.

It is an amenable number.

20005440245 is a deficient number, since it is larger than the sum of its proper divisors (7434086923).

20005440245 is an equidigital number, since it uses as much as digits as its factorization.

20005440245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72820.

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 20005440245 its reverse (54204450002), we get a palindrome (74209890247).

The spelling of 20005440245 in words is "twenty billion, five million, four hundred forty thousand, two hundred forty-five".