20439196393 has 24 divisors (see below), whose sum is σ = 26489579904. Its totient is φ = 15587762400.

The previous prime is 20439196387. The next prime is 20439196417. The reversal of 20439196393 is 39369193402.

It is not a de Polignac number, because 20439196393 - 2⁵ = 20439196361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20439196093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378078 + ... + 428743.

It is an arithmetic number, because the mean of its divisors is an integer number (1103732496).

Almost surely, 2^20439196393 is an apocalyptic number.

It is an amenable number.

20439196393 is a deficient number, since it is larger than the sum of its proper divisors (6050383511).

20439196393 is a wasteful number, since it uses less digits than its factorization.

20439196393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806893 (or 806886 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 49.

The spelling of 20439196393 in words is "twenty billion, four hundred thirty-nine million, one hundred ninety-six thousand, three hundred ninety-three".