20370776313889 has 4 divisors (see below), whose sum is σ = 20921337835924. Its totient is φ = 19820214791856.

The previous prime is 20370776313821. The next prime is 20370776313913. The reversal of 20370776313889 is 98831367707302.

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 7087266244864 + 13283510069025 = 2662192^2 + 3644655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20370776313889 is a prime.

It is a super-2 number, since 2×20370776313889² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20370776313889.

It is not an unprimeable number, because it can be changed into a prime (20370776313809) 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, 275280760962 + ... + 275280761035.

It is an arithmetic number, because the mean of its divisors is an integer number (5230334458981).

Almost surely, 2^{20370776313889} is an apocalyptic number.

It is an amenable number.

20370776313889 is a deficient number, since it is larger than the sum of its proper divisors (550561522035).

20370776313889 is an equidigital number, since it uses as much as digits as its factorization.

20370776313889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550561522034.

The product of its (nonzero) digits is 64012032, while the sum is 64.

The spelling of 20370776313889 in words is "twenty trillion, three hundred seventy billion, seven hundred seventy-six million, three hundred thirteen thousand, eight hundred eighty-nine".