21382625161 has 8 divisors (see below), whose sum is σ = 21480873920. Its totient is φ = 21284419248.

The previous prime is 21382625141. The next prime is 21382625191. The reversal of 21382625161 is 16152628312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21382625161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21382625161.

It is not an unprimeable number, because it can be changed into a prime (21382625141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423090 + ... + 1438036.

It is an arithmetic number, because the mean of its divisors is an integer number (2685109240).

Almost surely, 2^21382625161 is an apocalyptic number.

It is an amenable number.

21382625161 is a deficient number, since it is larger than the sum of its proper divisors (98248759).

21382625161 is a wasteful number, since it uses less digits than its factorization.

21382625161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21423.

The product of its digits is 34560, while the sum is 37.

The spelling of 21382625161 in words is "twenty-one billion, three hundred eighty-two million, six hundred twenty-five thousand, one hundred sixty-one".