21224032503847 has 2 divisors, whose sum is σ = 21224032503848. Its totient is φ = 21224032503846.

The previous prime is 21224032503809. The next prime is 21224032503851. The reversal of 21224032503847 is 74830523042212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21224032503847 - 2¹¹ = 21224032501799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21224032503347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612016251923 + 10612016251924.

It is an arithmetic number, because the mean of its divisors is an integer number (10612016251924).

Almost surely, 2^{21224032503847} is an apocalyptic number.

21224032503847 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224032503847 is an equidigital number, since it uses as much as digits as its factorization.

21224032503847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 21224032503847 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred three thousand, eight hundred forty-seven".