20220209987 has 2 divisors, whose sum is σ = 20220209988. Its totient is φ = 20220209986.

The previous prime is 20220209959. The next prime is 20220210007. The reversal of 20220209987 is 78990202202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20220209987 - 2¹⁰ = 20220208963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220209287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110104993 + 10110104994.

It is an arithmetic number, because the mean of its divisors is an integer number (10110104994).

Almost surely, 2^20220209987 is an apocalyptic number.

20220209987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220209987 is an equidigital number, since it uses as much as digits as its factorization.

20220209987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 20220209987 in words is "twenty billion, two hundred twenty million, two hundred nine thousand, nine hundred eighty-seven".