20101101947 has 2 divisors, whose sum is σ = 20101101948. Its totient is φ = 20101101946.

The previous prime is 20101101913. The next prime is 20101101959. The reversal of 20101101947 is 74910110102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101101947 - 2⁶ = 20101101883 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101101997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050550973 + 10050550974.

It is an arithmetic number, because the mean of its divisors is an integer number (10050550974).

Almost surely, 2^20101101947 is an apocalyptic number.

20101101947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101101947 is an equidigital number, since it uses as much as digits as its factorization.

20101101947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 20101101947 in words is "twenty billion, one hundred one million, one hundred one thousand, nine hundred forty-seven".