21942379146 has 16 divisors (see below), whose sum is σ = 43904143584. Its totient is φ = 7310895504.

The previous prime is 21942379117. The next prime is 21942379169. The reversal of 21942379146 is 64197324912.

It is a junction number, because it is equal to n+sod(n) for n = 21942379095 and 21942379104.

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 7 ways as a sum of consecutive naturals, for example, 792985 + ... + 820188.

It is an arithmetic number, because the mean of its divisors is an integer number (2744008974).

Almost surely, 2^21942379146 is an apocalyptic number.

21942379146 is an abundant number, since it is smaller than the sum of its proper divisors (21961764438).

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

21942379146 is a wasteful number, since it uses less digits than its factorization.

21942379146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615445.

The product of its digits is 653184, while the sum is 48.

The spelling of 21942379146 in words is "twenty-one billion, nine hundred forty-two million, three hundred seventy-nine thousand, one hundred forty-six".