22000021998947 has 2 divisors, whose sum is σ = 22000021998948. Its totient is φ = 22000021998946.

The previous prime is 22000021998893. The next prime is 22000021998959. The reversal of 22000021998947 is 74989912000022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22000021998947 - 2¹⁰ = 22000021997923 is a prime.

It is not a weakly prime, because it can be changed into another prime (22000021988947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000010999473 + 11000010999474.

It is an arithmetic number, because the mean of its divisors is an integer number (11000010999474).

Almost surely, 2^{22000021998947} is an apocalyptic number.

22000021998947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000021998947 is an equidigital number, since it uses as much as digits as its factorization.

22000021998947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 53.

Adding to 22000021998947 its reverse (74989912000022), we get a palindrome (96989933998969).

The spelling of 22000021998947 in words is "twenty-two trillion, twenty-one million, nine hundred ninety-eight thousand, nine hundred forty-seven".