20954647127 has 2 divisors, whose sum is σ = 20954647128. Its totient is φ = 20954647126.

The previous prime is 20954647079. The next prime is 20954647157. The reversal of 20954647127 is 72174645902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20954647127 - 2⁸ = 20954646871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20954647157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477323563 + 10477323564.

It is an arithmetic number, because the mean of its divisors is an integer number (10477323564).

Almost surely, 2^20954647127 is an apocalyptic number.

20954647127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20954647127 is an equidigital number, since it uses as much as digits as its factorization.

20954647127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 20954647127 in words is "twenty billion, nine hundred fifty-four million, six hundred forty-seven thousand, one hundred twenty-seven".