21763198790 has 16 divisors (see below), whose sum is σ = 39482214912. Its totient is φ = 8636733504.

The previous prime is 21763198777. The next prime is 21763198819. The reversal of 21763198790 is 9789136712.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8566919 + ... + 8569458.

It is an arithmetic number, because the mean of its divisors is an integer number (2467638432).

Almost surely, 2^21763198790 is an apocalyptic number.

21763198790 is a deficient number, since it is larger than the sum of its proper divisors (17719016122).

21763198790 is a wasteful number, since it uses less digits than its factorization.

21763198790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17136511.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 21763198790 in words is "twenty-one billion, seven hundred sixty-three million, one hundred ninety-eight thousand, seven hundred ninety".