16720017005 has 8 divisors (see below), whose sum is σ = 21120021600. Its totient is φ = 12672012816.

The previous prime is 16720017001. The next prime is 16720017047. The reversal of 16720017005 is 50071002761.

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

It is a cyclic number.

It is not a de Polignac number, because 16720017005 - 2² = 16720017001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720017001) 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, 87999995 + ... + 88000184.

It is an arithmetic number, because the mean of its divisors is an integer number (2640002700).

Almost surely, 2^16720017005 is an apocalyptic number.

It is an amenable number.

16720017005 is a deficient number, since it is larger than the sum of its proper divisors (4400004595).

16720017005 is a wasteful number, since it uses less digits than its factorization.

16720017005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176000203.

The product of its (nonzero) digits is 2940, while the sum is 29.

Adding to 16720017005 its reverse (50071002761), we get a palindrome (66791019766).

The spelling of 16720017005 in words is "sixteen billion, seven hundred twenty million, seventeen thousand, five".