20675109971 has 2 divisors, whose sum is σ = 20675109972. Its totient is φ = 20675109970.

The previous prime is 20675109953. The next prime is 20675110019. The reversal of 20675109971 is 17990157602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20675109971 - 2¹⁰ = 20675108947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20675109271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337554985 + 10337554986.

It is an arithmetic number, because the mean of its divisors is an integer number (10337554986).

Almost surely, 2^20675109971 is an apocalyptic number.

20675109971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20675109971 is an equidigital number, since it uses as much as digits as its factorization.

20675109971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 47.

The spelling of 20675109971 in words is "twenty billion, six hundred seventy-five million, one hundred nine thousand, nine hundred seventy-one".