16720430452205 has 16 divisors (see below), whose sum is σ = 20259553192320. Its totient is φ = 13246322948928.

The previous prime is 16720430452169. The next prime is 16720430452267. The reversal of 16720430452205 is 50225403402761.

It is a cyclic number.

It is not a de Polignac number, because 16720430452205 - 2¹⁰ = 16720430451181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68176379 + ... + 68421191.

It is an arithmetic number, because the mean of its divisors is an integer number (1266222074520).

Almost surely, 2^{16720430452205} is an apocalyptic number.

It is an amenable number.

16720430452205 is a deficient number, since it is larger than the sum of its proper divisors (3539122740115).

16720430452205 is a wasteful number, since it uses less digits than its factorization.

16720430452205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377540.

The product of its (nonzero) digits is 403200, while the sum is 41.

Adding to 16720430452205 its reverse (50225403402761), we get a palindrome (66945833854966).

The spelling of 16720430452205 in words is "sixteen trillion, seven hundred twenty billion, four hundred thirty million, four hundred fifty-two thousand, two hundred five".