20196308649 has 16 divisors (see below), whose sum is σ = 29383004160. Its totient is φ = 12237455760.

The previous prime is 20196308617. The next prime is 20196308677. The reversal of 20196308649 is 94680369102.

It is not a de Polignac number, because 20196308649 - 2⁵ = 20196308617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20196308598 and 20196308607.

It is not an unprimeable number, because it can be changed into a prime (20196308689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87124 + ... + 219050.

It is an arithmetic number, because the mean of its divisors is an integer number (1836437760).

Almost surely, 2^20196308649 is an apocalyptic number.

It is an amenable number.

20196308649 is a deficient number, since it is larger than the sum of its proper divisors (9186695511).

20196308649 is a wasteful number, since it uses less digits than its factorization.

20196308649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136580.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 20196308649 in words is "twenty billion, one hundred ninety-six million, three hundred eight thousand, six hundred forty-nine".