16720541504693 has 32 divisors (see below), whose sum is σ = 19577358259200. Its totient is φ = 14142043238400.

The previous prime is 16720541504603. The next prime is 16720541504713. The reversal of 16720541504693 is 39640514502761.

It is a cyclic number.

It is not a de Polignac number, because 16720541504693 - 2¹⁴ = 16720541488309 is a prime.

It is a super-2 number, since 2×16720541504693² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720541504603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12446933 + ... + 13724693.

It is an arithmetic number, because the mean of its divisors is an integer number (611792445600).

Almost surely, 2^{16720541504693} is an apocalyptic number.

16720541504693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16720541504693 is a deficient number, since it is larger than the sum of its proper divisors (2856816754507).

16720541504693 is a wasteful number, since it uses less digits than its factorization.

16720541504693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279533.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 16720541504693 in words is "sixteen trillion, seven hundred twenty billion, five hundred forty-one million, five hundred four thousand, six hundred ninety-three".