20220218987 has 2 divisors, whose sum is σ = 20220218988. Its totient is φ = 20220218986.

The previous prime is 20220218947. The next prime is 20220219001. The reversal of 20220218987 is 78981202202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20220218987 - 2⁸ = 20220218731 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220218947) 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, 10110109493 + 10110109494.

It is an arithmetic number, because the mean of its divisors is an integer number (10110109494).

Almost surely, 2^20220218987 is an apocalyptic number.

20220218987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220218987 is an equidigital number, since it uses as much as digits as its factorization.

20220218987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 20220218987 in words is "twenty billion, two hundred twenty million, two hundred eighteen thousand, nine hundred eighty-seven".