20372201454217 has 2 divisors, whose sum is σ = 20372201454218. Its totient is φ = 20372201454216.

The previous prime is 20372201454151. The next prime is 20372201454239. The reversal of 20372201454217 is 71245410227302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17178131911801 + 3194069542416 = 4144651^2 + 1787196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20372201454217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20372201454217.

It is not a weakly prime, because it can be changed into another prime (20372201454317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186100727108 + 10186100727109.

It is an arithmetic number, because the mean of its divisors is an integer number (10186100727109).

Almost surely, 2^{20372201454217} is an apocalyptic number.

It is an amenable number.

20372201454217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372201454217 is an equidigital number, since it uses as much as digits as its factorization.

20372201454217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 20372201454217 in words is "twenty trillion, three hundred seventy-two billion, two hundred one million, four hundred fifty-four thousand, two hundred seventeen".