17380054021 has 4 divisors (see below), whose sum is σ = 18960058944. Its totient is φ = 15800049100.

The previous prime is 17380054009. The next prime is 17380054051. The reversal of 17380054021 is 12045008371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 17380054021 - 2¹⁹ = 17379529733 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17380054051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790002445 + ... + 790002466.

It is an arithmetic number, because the mean of its divisors is an integer number (4740014736).

Almost surely, 2^17380054021 is an apocalyptic number.

17380054021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17380054021 is a deficient number, since it is larger than the sum of its proper divisors (1580004923).

17380054021 is a wasteful number, since it uses less digits than its factorization.

17380054021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580004922.

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 17380054021 in words is "seventeen billion, three hundred eighty million, fifty-four thousand, twenty-one".