20202199987 has 2 divisors, whose sum is σ = 20202199988. Its totient is φ = 20202199986.

The previous prime is 20202199957. The next prime is 20202199999. The reversal of 20202199987 is 78999120202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20202199987 - 2¹⁹ = 20201675699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202199987.

It is not a weakly prime, because it can be changed into another prime (20202199957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101099993 + 10101099994.

It is an arithmetic number, because the mean of its divisors is an integer number (10101099994).

Almost surely, 2^20202199987 is an apocalyptic number.

20202199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202199987 is an equidigital number, since it uses as much as digits as its factorization.

20202199987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 20202199987 in words is "twenty billion, two hundred two million, one hundred ninety-nine thousand, nine hundred eighty-seven".