2804086021 has 4 divisors (see below), whose sum is σ = 3059002944. Its totient is φ = 2549169100.

The previous prime is 2804086007. The next prime is 2804086037. The reversal of 2804086021 is 1206804082.

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 2804086021 - 2⁵ = 2804085989 is a prime.

It is a super-2 number, since 2×2804086021² = 15725796826335224882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2804086091) 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, 127458445 + ... + 127458466.

It is an arithmetic number, because the mean of its divisors is an integer number (764750736).

Almost surely, 2^2804086021 is an apocalyptic number.

It is an amenable number.

2804086021 is a deficient number, since it is larger than the sum of its proper divisors (254916923).

2804086021 is a wasteful number, since it uses less digits than its factorization.

2804086021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254916922.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 2804086021 is about 52953.6214153480. The cubic root of 2804086021 is about 1410.1450181981.

The spelling of 2804086021 in words is "two billion, eight hundred four million, eighty-six thousand, twenty-one".