21793908670 has 16 divisors (see below), whose sum is σ = 39231494640. Its totient is φ = 8717017024.

The previous prime is 21793908667. The next prime is 21793908677. The reversal of 21793908670 is 7680939712.

21793908670 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21793908677) 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 7 ways as a sum of consecutive naturals, for example, 125346 + ... + 243514.

It is an arithmetic number, because the mean of its divisors is an integer number (2451968415).

Almost surely, 2^21793908670 is an apocalyptic number.

21793908670 is a deficient number, since it is larger than the sum of its proper divisors (17437585970).

21793908670 is a wasteful number, since it uses less digits than its factorization.

21793908670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136619.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 21793908670 in words is "twenty-one billion, seven hundred ninety-three million, nine hundred eight thousand, six hundred seventy".