19820906071 has 2 divisors, whose sum is σ = 19820906072. Its totient is φ = 19820906070.

The previous prime is 19820906059. The next prime is 19820906117. The reversal of 19820906071 is 17060902891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19820906071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19820906471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9910453035 + 9910453036.

It is an arithmetic number, because the mean of its divisors is an integer number (9910453036).

Almost surely, 2^19820906071 is an apocalyptic number.

19820906071 is a deficient number, since it is larger than the sum of its proper divisors (1).

19820906071 is an equidigital number, since it uses as much as digits as its factorization.

19820906071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 19820906071 in words is "nineteen billion, eight hundred twenty million, nine hundred six thousand, seventy-one".