20389293673 has 8 divisors (see below), whose sum is σ = 23797838592. Its totient is φ = 17104695936.

The previous prime is 20389293649. The next prime is 20389293707. The reversal of 20389293673 is 37639298302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20389293673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20389293673.

It is not an unprimeable number, because it can be changed into a prime (20389293073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30986440 + ... + 30987097.

It is an arithmetic number, because the mean of its divisors is an integer number (2974729824).

Almost surely, 2^20389293673 is an apocalyptic number.

It is an amenable number.

20389293673 is a deficient number, since it is larger than the sum of its proper divisors (3408544919).

20389293673 is an equidigital number, since it uses as much as digits as its factorization.

20389293673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61973591.

The product of its (nonzero) digits is 2939328, while the sum is 52.

The spelling of 20389293673 in words is "twenty billion, three hundred eighty-nine million, two hundred ninety-three thousand, six hundred seventy-three".