20550000313 has 4 divisors (see below), whose sum is σ = 20551582948. Its totient is φ = 20548417680.

The previous prime is 20550000307. The next prime is 20550000349. The reversal of 20550000313 is 31300005502.

It is the 58524-th star number.

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 11951518329 + 8598481984 = 109323^2 + 92728^2 .

It is a cyclic number.

It is not a de Polignac number, because 20550000313 - 2¹³ = 20549992121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550000353) 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, 771678 + ... + 797863.

It is an arithmetic number, because the mean of its divisors is an integer number (5137895737).

Almost surely, 2^20550000313 is an apocalyptic number.

It is an amenable number.

20550000313 is a deficient number, since it is larger than the sum of its proper divisors (1582635).

20550000313 is a wasteful number, since it uses less digits than its factorization.

20550000313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582634.

The product of its (nonzero) digits is 450, while the sum is 19.

Adding to 20550000313 its reverse (31300005502), we get a palindrome (51850005815).

The spelling of 20550000313 in words is "twenty billion, five hundred fifty million, three hundred thirteen", and thus it is an aban number.