3011800021 has 8 divisors (see below), whose sum is σ = 3143335104. Its totient is φ = 2880313920.

The previous prime is 3011800007. The next prime is 3011800039. The reversal of 3011800021 is 1200081103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3011800021 - 2⁷ = 3011799893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3011799968 and 3011800004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3011800061) 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 7 ways as a sum of consecutive naturals, for example, 173581 + ... + 190141.

It is an arithmetic number, because the mean of its divisors is an integer number (392916888).

Almost surely, 2^3011800021 is an apocalyptic number.

It is an amenable number.

3011800021 is a deficient number, since it is larger than the sum of its proper divisors (131535083).

3011800021 is a wasteful number, since it uses less digits than its factorization.

3011800021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24491.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 3011800021 is about 54879.8689958349. The cubic root of 3011800021 is about 1444.1380492591.

Adding to 3011800021 its reverse (1200081103), we get a palindrome (4211881124).

The spelling of 3011800021 in words is "three billion, eleven million, eight hundred thousand, twenty-one".