2002056421 has 8 divisors (see below), whose sum is σ = 2056839680. Its totient is φ = 1947308688.

The previous prime is 2002056379. The next prime is 2002056437. The reversal of 2002056421 is 1246502002.

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

It is a cyclic number.

It is not a de Polignac number, because 2002056421 - 2⁷ = 2002056293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002056392 and 2002056401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002056451) 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 7 ways as a sum of consecutive naturals, for example, 138100 + ... + 151906.

It is an arithmetic number, because the mean of its divisors is an integer number (257104960).

Almost surely, 2^2002056421 is an apocalyptic number.

It is an amenable number.

2002056421 is a deficient number, since it is larger than the sum of its proper divisors (54783259).

2002056421 is a wasteful number, since it uses less digits than its factorization.

2002056421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17763.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2002056421 is about 44744.3451287422. The cubic root of 2002056421 is about 1260.3527233292.

Adding to 2002056421 its reverse (1246502002), we get a palindrome (3248558423).

The spelling of 2002056421 in words is "two billion, two million, fifty-six thousand, four hundred twenty-one".