22016320521973 has 2 divisors, whose sum is σ = 22016320521974. Its totient is φ = 22016320521972.

The previous prime is 22016320521931. The next prime is 22016320521983. The reversal of 22016320521973 is 37912502361022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21962560534929 + 53759987044 = 4686423^2 + 231862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22016320521973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22016320521983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11008160260986 + 11008160260987.

It is an arithmetic number, because the mean of its divisors is an integer number (11008160260987).

Almost surely, 2^{22016320521973} is an apocalyptic number.

It is an amenable number.

22016320521973 is a deficient number, since it is larger than the sum of its proper divisors (1).

22016320521973 is an equidigital number, since it uses as much as digits as its factorization.

22016320521973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

Adding to 22016320521973 its reverse (37912502361022), we get a palindrome (59928822882995).

The spelling of 22016320521973 in words is "twenty-two trillion, sixteen billion, three hundred twenty million, five hundred twenty-one thousand, nine hundred seventy-three".