20744487241 has 4 divisors (see below), whose sum is σ = 20744870272. Its totient is φ = 20744104212.

The previous prime is 20744487227. The next prime is 20744487251. The reversal of 20744487241 is 14278444702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20744487241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20744487251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93585 + ... + 224158.

It is an arithmetic number, because the mean of its divisors is an integer number (5186217568).

Almost surely, 2^20744487241 is an apocalyptic number.

It is an amenable number.

20744487241 is a deficient number, since it is larger than the sum of its proper divisors (383031).

20744487241 is an equidigital number, since it uses as much as digits as its factorization.

20744487241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383030.

The product of its (nonzero) digits is 401408, while the sum is 43.

The spelling of 20744487241 in words is "twenty billion, seven hundred forty-four million, four hundred eighty-seven thousand, two hundred forty-one".