20371761061 has 4 divisors (see below), whose sum is σ = 20868633324. Its totient is φ = 19874888800.

The previous prime is 20371761037. The next prime is 20371761071. The reversal of 20371761061 is 16016717302.

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 7409938561 + 12961822500 = 86081^2 + 113850^2 .

It is a cyclic number.

It is not a de Polignac number, because 20371761061 - 2⁵ = 20371761029 is a prime.

It is a super-3 number, since 3×20371761061³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20371761071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248436070 + ... + 248436151.

It is an arithmetic number, because the mean of its divisors is an integer number (5217158331).

Almost surely, 2^20371761061 is an apocalyptic number.

It is an amenable number.

20371761061 is a deficient number, since it is larger than the sum of its proper divisors (496872263).

20371761061 is an equidigital number, since it uses as much as digits as its factorization.

20371761061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496872262.

The product of its (nonzero) digits is 10584, while the sum is 34.

The spelling of 20371761061 in words is "twenty billion, three hundred seventy-one million, seven hundred sixty-one thousand, sixty-one".