20162471773 has 4 divisors (see below), whose sum is σ = 20211769180. Its totient is φ = 20113174368.

The previous prime is 20162471743. The next prime is 20162471779. The reversal of 20162471773 is 37717426102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18273091684 + 1889380089 = 135178^2 + 43467^2 .

It is a cyclic number.

It is not a de Polignac number, because 20162471773 - 2²⁹ = 19625600861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20162471779) 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, 24648090 + ... + 24648907.

It is an arithmetic number, because the mean of its divisors is an integer number (5052942295).

Almost surely, 2^20162471773 is an apocalyptic number.

It is an amenable number.

20162471773 is a deficient number, since it is larger than the sum of its proper divisors (49297407).

20162471773 is an equidigital number, since it uses as much as digits as its factorization.

20162471773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49297406.

The product of its (nonzero) digits is 98784, while the sum is 40.

Adding to 20162471773 its reverse (37717426102), we get a palindrome (57879897875).

The spelling of 20162471773 in words is "twenty billion, one hundred sixty-two million, four hundred seventy-one thousand, seven hundred seventy-three".