20319620269 has 16 divisors (see below), whose sum is σ = 23008371120. Its totient is φ = 17812892160.

The previous prime is 20319620249. The next prime is 20319620297. The reversal of 20319620269 is 96202691302.

It can be written as a sum of positive squares in 8 ways, for example, as 1996749225 + 18322871044 = 44685^2 + 135362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20319620269 is a prime.

It is a super-2 number, since 2×20319620269² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20319620249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418792 + ... + 464785.

It is an arithmetic number, because the mean of its divisors is an integer number (1438023195).

Almost surely, 2^20319620269 is an apocalyptic number.

20319620269 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20319620269 is a deficient number, since it is larger than the sum of its proper divisors (2688750851).

20319620269 is a wasteful number, since it uses less digits than its factorization.

20319620269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883680.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 20319620269 in words is "twenty billion, three hundred nineteen million, six hundred twenty thousand, two hundred sixty-nine".