16953230021 has 8 divisors (see below), whose sum is σ = 20865513984. Its totient is φ = 13413544560.

The previous prime is 16953229927. The next prime is 16953230027. The reversal of 16953230021 is 12003235961.

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

It is not a de Polignac number, because 16953230021 - 2¹⁰ = 16953228997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16953230021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16953230027) 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, 93149525 + ... + 93149706.

It is an arithmetic number, because the mean of its divisors is an integer number (2608189248).

Almost surely, 2^16953230021 is an apocalyptic number.

It is an amenable number.

16953230021 is a deficient number, since it is larger than the sum of its proper divisors (3912283963).

16953230021 is a wasteful number, since it uses less digits than its factorization.

16953230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186299251.

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 16953230021 its reverse (12003235961), we get a palindrome (28956465982).

The spelling of 16953230021 in words is "sixteen billion, nine hundred fifty-three million, two hundred thirty thousand, twenty-one".