20055820313 has 4 divisors (see below), whose sum is σ = 20202213300. Its totient is φ = 19909427328.

The previous prime is 20055820277. The next prime is 20055820321. The reversal of 20055820313 is 31302855002.

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 9902638144 + 10153182169 = 99512^2 + 100763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20055820313 - 2¹⁸ = 20055558169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055820373) 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, 73196288 + ... + 73196561.

It is an arithmetic number, because the mean of its divisors is an integer number (5050553325).

Almost surely, 2^20055820313 is an apocalyptic number.

It is an amenable number.

20055820313 is a deficient number, since it is larger than the sum of its proper divisors (146392987).

20055820313 is a wasteful number, since it uses less digits than its factorization.

20055820313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146392986.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20055820313 in words is "twenty billion, fifty-five million, eight hundred twenty thousand, three hundred thirteen".