21049843070 has 16 divisors (see below), whose sum is σ = 37905876288. Its totient is φ = 8416346400.

The previous prime is 21049843069. The next prime is 21049843109. The reversal of 21049843070 is 7034894012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424169 + ... + 471188.

It is an arithmetic number, because the mean of its divisors is an integer number (2369117268).

Almost surely, 2^21049843070 is an apocalyptic number.

21049843070 is a deficient number, since it is larger than the sum of its proper divisors (16856033218).

21049843070 is a wasteful number, since it uses less digits than its factorization.

21049843070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897715.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 21049843070 in words is "twenty-one billion, forty-nine million, eight hundred forty-three thousand, seventy".