20011422971 has 2 divisors, whose sum is σ = 20011422972. Its totient is φ = 20011422970.

The previous prime is 20011422853. The next prime is 20011422989. The reversal of 20011422971 is 17922411002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011422971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011425971) 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, 10005711485 + 10005711486.

It is an arithmetic number, because the mean of its divisors is an integer number (10005711486).

Almost surely, 2^20011422971 is an apocalyptic number.

20011422971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011422971 is an equidigital number, since it uses as much as digits as its factorization.

20011422971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

Adding to 20011422971 its reverse (17922411002), we get a palindrome (37933833973).

The spelling of 20011422971 in words is "twenty billion, eleven million, four hundred twenty-two thousand, nine hundred seventy-one".