20279103539471 has 4 divisors (see below), whose sum is σ = 23176118330832. Its totient is φ = 17382088748112.

The previous prime is 20279103539419. The next prime is 20279103539473. The reversal of 20279103539471 is 17493530197202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20279103539471 is a prime.

It is a super-3 number, since 3×20279103539471³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20279103539473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1448507395670 + ... + 1448507395683.

It is an arithmetic number, because the mean of its divisors is an integer number (5794029582708).

Almost surely, 2^{20279103539471} is an apocalyptic number.

20279103539471 is a deficient number, since it is larger than the sum of its proper divisors (2897014791361).

20279103539471 is an equidigital number, since it uses as much as digits as its factorization.

20279103539471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897014791360.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 20279103539471 in words is "twenty trillion, two hundred seventy-nine billion, one hundred three million, five hundred thirty-nine thousand, four hundred seventy-one".