21712166430 has 32 divisors (see below), whose sum is σ = 52115452704. Its totient is φ = 5789216256.

The previous prime is 21712166423. The next prime is 21712166459. The reversal of 21712166430 is 3466121712.

It is a junction number, because it is equal to n+sod(n) for n = 21712166391 and 21712166400.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 241354 + ... + 318866.

It is an arithmetic number, because the mean of its divisors is an integer number (1628607897).

Almost surely, 2^21712166430 is an apocalyptic number.

21712166430 is an abundant number, since it is smaller than the sum of its proper divisors (30403286274).

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

21712166430 is a wasteful number, since it uses less digits than its factorization.

21712166430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86860.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 21712166430 in words is "twenty-one billion, seven hundred twelve million, one hundred sixty-six thousand, four hundred thirty".