20223131947 has 2 divisors, whose sum is σ = 20223131948. Its totient is φ = 20223131946.

The previous prime is 20223131867. The next prime is 20223131977. The reversal of 20223131947 is 74913132202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20223131947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20223131977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111565973 + 10111565974.

It is an arithmetic number, because the mean of its divisors is an integer number (10111565974).

Almost surely, 2^20223131947 is an apocalyptic number.

20223131947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223131947 is an equidigital number, since it uses as much as digits as its factorization.

20223131947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 20223131947 in words is "twenty billion, two hundred twenty-three million, one hundred thirty-one thousand, nine hundred forty-seven".