21793650208 has 48 divisors (see below), whose sum is σ = 49560172704. Its totient is φ = 9323484160.

The previous prime is 21793650173. The next prime is 21793650233. The reversal of 21793650208 is 80205639712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1815010 + ... + 1826977.

It is an arithmetic number, because the mean of its divisors is an integer number (1032503598).

Almost surely, 2^21793650208 is an apocalyptic number.

It is an amenable number.

21793650208 is an abundant number, since it is smaller than the sum of its proper divisors (27766522496).

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

21793650208 is a wasteful number, since it uses less digits than its factorization.

21793650208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642025 (or 3642017 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 21793650208 in words is "twenty-one billion, seven hundred ninety-three million, six hundred fifty thousand, two hundred eight".