20330221099987 has 2 divisors, whose sum is σ = 20330221099988. Its totient is φ = 20330221099986.

The previous prime is 20330221099901. The next prime is 20330221099997. The reversal of 20330221099987 is 78999012203302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330221099987 is a prime.

It is not a weakly prime, because it can be changed into another prime (20330221099997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165110549993 + 10165110549994.

It is an arithmetic number, because the mean of its divisors is an integer number (10165110549994).

Almost surely, 2^{20330221099987} is an apocalyptic number.

20330221099987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330221099987 is an equidigital number, since it uses as much as digits as its factorization.

20330221099987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 20330221099987 in words is "twenty trillion, three hundred thirty billion, two hundred twenty-one million, ninety-nine thousand, nine hundred eighty-seven".