10021673778 has 8 divisors (see below), whose sum is σ = 20043347568. Its totient is φ = 3340557924.

The previous prime is 10021673777. The next prime is 10021673789. The reversal of 10021673778 is 87737612001.

It is a happy number.

10021673778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

10021673778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (10021673773) 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 3 ways as a sum of consecutive naturals, for example, 835139476 + ... + 835139487.

It is an arithmetic number, because the mean of its divisors is an integer number (2505418446).

Almost surely, 2^10021673778 is an apocalyptic number.

10021673778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10021673778 is a wasteful number, since it uses less digits than its factorization.

10021673778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670278968.

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 10021673778 in words is "ten billion, twenty-one million, six hundred seventy-three thousand, seven hundred seventy-eight".