21094082378 has 8 divisors (see below), whose sum is σ = 33306445920. Its totient is φ = 9991933740.

The previous prime is 21094082357. The next prime is 21094082381. The reversal of 21094082378 is 87328049012.

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

It is a super-2 number, since 2×21094082378² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 277553678 + ... + 277553753.

It is an arithmetic number, because the mean of its divisors is an integer number (4163305740).

Almost surely, 2^21094082378 is an apocalyptic number.

21094082378 is a deficient number, since it is larger than the sum of its proper divisors (12212363542).

21094082378 is a wasteful number, since it uses less digits than its factorization.

21094082378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555107452.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 21094082378 in words is "twenty-one billion, ninety-four million, eighty-two thousand, three hundred seventy-eight".