20010099971 has 2 divisors, whose sum is σ = 20010099972. Its totient is φ = 20010099970.

The previous prime is 20010099959. The next prime is 20010099973. The reversal of 20010099971 is 17999001002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010099971 is a prime.

Together with 20010099973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20010099973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005049985 + 10005049986.

It is an arithmetic number, because the mean of its divisors is an integer number (10005049986).

Almost surely, 2^20010099971 is an apocalyptic number.

20010099971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010099971 is an equidigital number, since it uses as much as digits as its factorization.

20010099971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 38.

The spelling of 20010099971 in words is "twenty billion, ten million, ninety-nine thousand, nine hundred seventy-one".