16720973153 has 2 divisors, whose sum is σ = 16720973154. Its totient is φ = 16720973152.

The previous prime is 16720973131. The next prime is 16720973177. The reversal of 16720973153 is 35137902761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16666035409 + 54937744 = 129097^2 + 7412^2 .

It is a cyclic number.

It is not a de Polignac number, because 16720973153 - 2²⁶ = 16653864289 is a prime.

It is a super-2 number, since 2×16720973153² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16720973053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360486576 + 8360486577.

It is an arithmetic number, because the mean of its divisors is an integer number (8360486577).

Almost surely, 2^16720973153 is an apocalyptic number.

It is an amenable number.

16720973153 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720973153 is an equidigital number, since it uses as much as digits as its factorization.

16720973153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 44.

The spelling of 16720973153 in words is "sixteen billion, seven hundred twenty million, nine hundred seventy-three thousand, one hundred fifty-three".