20309699245 has 8 divisors (see below), whose sum is σ = 26587242720. Its totient is φ = 14770690320.

The previous prime is 20309699239. The next prime is 20309699257. The reversal of 20309699245 is 54299690302.

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

It is not a de Polignac number, because 20309699245 - 2³ = 20309699237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 184633575 + ... + 184633684.

It is an arithmetic number, because the mean of its divisors is an integer number (3323405340).

Almost surely, 2^20309699245 is an apocalyptic number.

It is an amenable number.

20309699245 is a deficient number, since it is larger than the sum of its proper divisors (6277543475).

20309699245 is a wasteful number, since it uses less digits than its factorization.

20309699245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369267275.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 20309699245 in words is "twenty billion, three hundred nine million, six hundred ninety-nine thousand, two hundred forty-five".