20570235971 has 2 divisors, whose sum is σ = 20570235972. Its totient is φ = 20570235970.

The previous prime is 20570235967. The next prime is 20570235979. The reversal of 20570235971 is 17953207502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20570235971 - 2² = 20570235967 is a prime.

It is not a weakly prime, because it can be changed into another prime (20570235979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10285117985 + 10285117986.

It is an arithmetic number, because the mean of its divisors is an integer number (10285117986).

Almost surely, 2^20570235971 is an apocalyptic number.

20570235971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20570235971 is an equidigital number, since it uses as much as digits as its factorization.

20570235971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 41.

The spelling of 20570235971 in words is "twenty billion, five hundred seventy million, two hundred thirty-five thousand, nine hundred seventy-one".