20071943449 has 8 divisors (see below), whose sum is σ = 20771422920. Its totient is φ = 19372953600.

The previous prime is 20071943443. The next prime is 20071943491. The reversal of 20071943449 is 94434917002.

It can be written as a sum of positive squares in 4 ways, for example, as 1332250000 + 18739693449 = 36500^2 + 136893^2 .

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 20071943449 - 2⁹ = 20071942937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071943443) 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, 37992 + ... + 203929.

It is an arithmetic number, because the mean of its divisors is an integer number (2596427865).

Almost surely, 2^20071943449 is an apocalyptic number.

20071943449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20071943449 is a deficient number, since it is larger than the sum of its proper divisors (699479471).

20071943449 is a wasteful number, since it uses less digits than its factorization.

20071943449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244811.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20071943449 in words is "twenty billion, seventy-one million, nine hundred forty-three thousand, four hundred forty-nine".