16953691830 has 128 divisors (see below), whose sum is σ = 45420549120. Its totient is φ = 4024811520.

The previous prime is 16953691817. The next prime is 16953691837. The reversal of 16953691830 is 3819635961.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16953691837) 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 63 ways as a sum of consecutive naturals, for example, 9989542 + ... + 9991238.

It is an arithmetic number, because the mean of its divisors is an integer number (354848040).

Almost surely, 2^16953691830 is an apocalyptic number.

16953691830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16953691830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22710274560).

16953691830 is an abundant number, since it is smaller than the sum of its proper divisors (28466857290).

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

16953691830 is a wasteful number, since it uses less digits than its factorization.

16953691830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 16953691830 in words is "sixteen billion, nine hundred fifty-three million, six hundred ninety-one thousand, eight hundred thirty".