20887142083 has 2 divisors, whose sum is σ = 20887142084. Its totient is φ = 20887142082.

The previous prime is 20887142047. The next prime is 20887142137. The reversal of 20887142083 is 38024178802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20887142083 is a prime.

It is not a weakly prime, because it can be changed into another prime (20887122083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10443571041 + 10443571042.

It is an arithmetic number, because the mean of its divisors is an integer number (10443571042).

Almost surely, 2^20887142083 is an apocalyptic number.

20887142083 is a deficient number, since it is larger than the sum of its proper divisors (1).

20887142083 is an equidigital number, since it uses as much as digits as its factorization.

20887142083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 20887142083 in words is "twenty billion, eight hundred eighty-seven million, one hundred forty-two thousand, eighty-three".