20344457983 has 2 divisors, whose sum is σ = 20344457984. Its totient is φ = 20344457982.

The previous prime is 20344457981. The next prime is 20344457999. The reversal of 20344457983 is 38975444302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20344457983 - 2¹ = 20344457981 is a prime.

It is a super-3 number, since 3×20344457983³ (a number of 32 digits) contains 333 as substring.

Together with 20344457981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344457981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172228991 + 10172228992.

It is an arithmetic number, because the mean of its divisors is an integer number (10172228992).

Almost surely, 2^20344457983 is an apocalyptic number.

20344457983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344457983 is an equidigital number, since it uses as much as digits as its factorization.

20344457983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 20344457983 in words is "twenty billion, three hundred forty-four million, four hundred fifty-seven thousand, nine hundred eighty-three".