20279103539473 has 2 divisors, whose sum is σ = 20279103539474. Its totient is φ = 20279103539472.

The previous prime is 20279103539419. The next prime is 20279103539479. The reversal of 20279103539473 is 37493530197202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19403743081024 + 875360458449 = 4404968^2 + 935607^2 .

It is a cyclic number.

It is not a de Polignac number, because 20279103539473 - 2¹⁷ = 20279103408401 is a prime.

It is a super-2 number, since 2×20279103539473² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20279103539479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10139551769736 + 10139551769737.

It is an arithmetic number, because the mean of its divisors is an integer number (10139551769737).

Almost surely, 2^{20279103539473} is an apocalyptic number.

It is an amenable number.

20279103539473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20279103539473 is an equidigital number, since it uses as much as digits as its factorization.

20279103539473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 55.

The spelling of 20279103539473 in words is "twenty trillion, two hundred seventy-nine billion, one hundred three million, five hundred thirty-nine thousand, four hundred seventy-three".