16730421444 has 144 divisors (see below), whose sum is σ = 48932118144. Its totient is φ = 4769740800.

The previous prime is 16730421391. The next prime is 16730421457. The reversal of 16730421444 is 44412403761.

16730421444 is a `hidden beast` number, since 167 + 30 + 4 + 21 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16730421399 and 16730421408.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 540532 + ... + 570644.

It is an arithmetic number, because the mean of its divisors is an integer number (339806376).

Almost surely, 2^16730421444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16730421444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24466059072).

16730421444 is an abundant number, since it is smaller than the sum of its proper divisors (32201696700).

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

16730421444 is a wasteful number, since it uses less digits than its factorization.

16730421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30218 (or 30213 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 16730421444 in words is "sixteen billion, seven hundred thirty million, four hundred twenty-one thousand, four hundred forty-four".