20021210147 has 2 divisors, whose sum is σ = 20021210148. Its totient is φ = 20021210146.

The previous prime is 20021210087. The next prime is 20021210189. The reversal of 20021210147 is 74101212002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021210147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021270147) 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, 10010605073 + 10010605074.

It is an arithmetic number, because the mean of its divisors is an integer number (10010605074).

Almost surely, 2^20021210147 is an apocalyptic number.

20021210147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021210147 is an equidigital number, since it uses as much as digits as its factorization.

20021210147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 20021210147 its reverse (74101212002), we get a palindrome (94122422149).

The spelling of 20021210147 in words is "twenty billion, twenty-one million, two hundred ten thousand, one hundred forty-seven".