45020813 has 2 divisors, whose sum is σ = 45020814. Its totient is φ = 45020812.

The previous prime is 45020771. The next prime is 45020819. The reversal of 45020813 is 31802054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44863204 + 157609 = 6698^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 45020813 - 2¹⁰ = 45019789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45020819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22510406 + 22510407.

It is an arithmetic number, because the mean of its divisors is an integer number (22510407).

Almost surely, 2^45020813 is an apocalyptic number.

It is an amenable number.

45020813 is a deficient number, since it is larger than the sum of its proper divisors (1).

45020813 is an equidigital number, since it uses as much as digits as its factorization.

45020813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 45020813 is about 6709.7550625936. The cubic root of 45020813 is about 355.7441587528.

Adding to 45020813 its reverse (31802054), we get a palindrome (76822867).

The spelling of 45020813 in words is "forty-five million, twenty thousand, eight hundred thirteen".