21830165966 has 16 divisors (see below), whose sum is σ = 37428837504. Its totient is φ = 9354361464.

The previous prime is 21830165963. The next prime is 21830165971. The reversal of 21830165966 is 66956103812.

It is a happy number.

It is a super-2 number, since 2×21830165966² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21830165966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21830165963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20600 + ... + 209963.

It is an arithmetic number, because the mean of its divisors is an integer number (2339302344).

Almost surely, 2^21830165966 is an apocalyptic number.

21830165966 is a deficient number, since it is larger than the sum of its proper divisors (15598671538).

21830165966 is a wasteful number, since it uses less digits than its factorization.

21830165966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237335.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 21830165966 in words is "twenty-one billion, eight hundred thirty million, one hundred sixty-five thousand, nine hundred sixty-six".