2109904642 has 8 divisors (see below), whose sum is σ = 3166765056. Its totient is φ = 1054316292.

The previous prime is 2109904639. The next prime is 2109904691. The reversal of 2109904642 is 2464099012.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313858 + ... + 320509.

It is an arithmetic number, because the mean of its divisors is an integer number (395845632).

Almost surely, 2^2109904642 is an apocalyptic number.

2109904642 is a deficient number, since it is larger than the sum of its proper divisors (1056860414).

2109904642 is a wasteful number, since it uses less digits than its factorization.

2109904642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636032.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2109904642 is about 45933.6983270453. The cubic root of 2109904642 is about 1282.5892902936.

The spelling of 2109904642 in words is "two billion, one hundred nine million, nine hundred four thousand, six hundred forty-two".