20211029947 has 2 divisors, whose sum is σ = 20211029948. Its totient is φ = 20211029946.

The previous prime is 20211029941. The next prime is 20211029953. The reversal of 20211029947 is 74992011202.

It is a balanced prime because it is at equal distance from previous prime (20211029941) and next prime (20211029953).

It is a cyclic number.

It is not a de Polignac number, because 20211029947 - 2¹¹ = 20211027899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211029941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105514973 + 10105514974.

It is an arithmetic number, because the mean of its divisors is an integer number (10105514974).

Almost surely, 2^20211029947 is an apocalyptic number.

20211029947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211029947 is an equidigital number, since it uses as much as digits as its factorization.

20211029947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 20211029947 in words is "twenty billion, two hundred eleven million, twenty-nine thousand, nine hundred forty-seven".