20264472080521 has 2 divisors, whose sum is σ = 20264472080522. Its totient is φ = 20264472080520.

The previous prime is 20264472080417. The next prime is 20264472080537. The reversal of 20264472080521 is 12508027446202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18210395508496 + 2054076572025 = 4267364^2 + 1433205^2 .

It is a cyclic number.

It is not a de Polignac number, because 20264472080521 - 2¹⁵ = 20264472047753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20264472080221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10132236040260 + 10132236040261.

It is an arithmetic number, because the mean of its divisors is an integer number (10132236040261).

Almost surely, 2^{20264472080521} is an apocalyptic number.

It is an amenable number.

20264472080521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20264472080521 is an equidigital number, since it uses as much as digits as its factorization.

20264472080521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 20264472080521 in words is "twenty trillion, two hundred sixty-four billion, four hundred seventy-two million, eighty thousand, five hundred twenty-one".