2867790021 has 16 divisors (see below), whose sum is σ = 3884160000. Its totient is φ = 1881811440.

The previous prime is 2867790017. The next prime is 2867790031. The reversal of 2867790021 is 1200977682.

It is not a de Polignac number, because 2867790021 - 2² = 2867790017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2867790001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46230 + ... + 88728.

It is an arithmetic number, because the mean of its divisors is an integer number (242760000).

Almost surely, 2^2867790021 is an apocalyptic number.

It is an amenable number.

2867790021 is a deficient number, since it is larger than the sum of its proper divisors (1016369979).

2867790021 is a wasteful number, since it uses less digits than its factorization.

2867790021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42856.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 2867790021 is about 53551.7508677354. The cubic root of 2867790021 is about 1420.7438443945.

The spelling of 2867790021 in words is "two billion, eight hundred sixty-seven million, seven hundred ninety thousand, twenty-one".