4811390021 has 4 divisors (see below), whose sum is σ = 4831521600. Its totient is φ = 4791258444.

The previous prime is 4811389993. The next prime is 4811390039. The reversal of 4811390021 is 1200931184.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4811390021 - 2¹⁰ = 4811388997 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 (4811390081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10065431 + ... + 10065908.

It is an arithmetic number, because the mean of its divisors is an integer number (1207880400).

Almost surely, 2^4811390021 is an apocalyptic number.

It is an amenable number.

4811390021 is a deficient number, since it is larger than the sum of its proper divisors (20131579).

4811390021 is a wasteful number, since it uses less digits than its factorization.

4811390021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131578.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 4811390021 is about 69364.1839928936. The cubic root of 4811390021 is about 1688.1985427024.

The spelling of 4811390021 in words is "four billion, eight hundred eleven million, three hundred ninety thousand, twenty-one".