5018851021 has 4 divisors (see below), whose sum is σ = 5033744092. Its totient is φ = 5003957952.

The previous prime is 5018850979. The next prime is 5018851031. The reversal of 5018851021 is 1201588105.

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 3387822025 + 1631028996 = 58205^2 + 40386^2 .

It is a cyclic number.

It is not a de Polignac number, because 5018851021 - 2¹¹ = 5018848973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5018851031) 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, 7446030 + ... + 7446703.

It is an arithmetic number, because the mean of its divisors is an integer number (1258436023).

Almost surely, 2^5018851021 is an apocalyptic number.

It is an amenable number.

5018851021 is a deficient number, since it is larger than the sum of its proper divisors (14893071).

5018851021 is a wasteful number, since it uses less digits than its factorization.

5018851021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14893070.

The product of its (nonzero) digits is 3200, while the sum is 31.

The square root of 5018851021 is about 70843.8495636707. The cubic root of 5018851021 is about 1712.1222377791.

The spelling of 5018851021 in words is "five billion, eighteen million, eight hundred fifty-one thousand, twenty-one".