20116693249 has 8 divisors (see below), whose sum is σ = 21455505288. Its totient is φ = 18795156480.

The previous prime is 20116693237. The next prime is 20116693309. The reversal of 20116693249 is 94239661102.

It can be written as a sum of positive squares in 4 ways, for example, as 1568160000 + 18548533249 = 39600^2 + 136193^2 .

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

It is not a de Polignac number, because 20116693249 - 2⁵ = 20116693217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116613249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4316412 + ... + 4321069.

It is an arithmetic number, because the mean of its divisors is an integer number (2681938161).

Almost surely, 2^20116693249 is an apocalyptic number.

It is an amenable number.

20116693249 is a deficient number, since it is larger than the sum of its proper divisors (1338812039).

20116693249 is a wasteful number, since it uses less digits than its factorization.

20116693249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8637635.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 20116693249 in words is "twenty billion, one hundred sixteen million, six hundred ninety-three thousand, two hundred forty-nine".