20281732019 has 2 divisors, whose sum is σ = 20281732020. Its totient is φ = 20281732018.

The previous prime is 20281732007. The next prime is 20281732021. The reversal of 20281732019 is 91023718202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20281732019 is a prime.

It is a super-2 number, since 2×20281732019² (a number of 21 digits) contains 22 as substring.

Together with 20281732021, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20281732019.

It is not a weakly prime, because it can be changed into another prime (20281732069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140866009 + 10140866010.

It is an arithmetic number, because the mean of its divisors is an integer number (10140866010).

Almost surely, 2^20281732019 is an apocalyptic number.

20281732019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20281732019 is an equidigital number, since it uses as much as digits as its factorization.

20281732019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 20281732019 in words is "twenty billion, two hundred eighty-one million, seven hundred thirty-two thousand, nineteen".