20046589643 has 4 divisors (see below), whose sum is σ = 20328936048. Its totient is φ = 19764243240.

The previous prime is 20046589639. The next prime is 20046589687. The reversal of 20046589643 is 34698564002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34698564002 = 2 ⋅17349282001.

It is a cyclic number.

It is not a de Polignac number, because 20046589643 - 2² = 20046589639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20046589943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141173096 + ... + 141173237.

It is an arithmetic number, because the mean of its divisors is an integer number (5082234012).

Almost surely, 2^20046589643 is an apocalyptic number.

20046589643 is a deficient number, since it is larger than the sum of its proper divisors (282346405).

20046589643 is an equidigital number, since it uses as much as digits as its factorization.

20046589643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282346404.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 20046589643 in words is "twenty billion, forty-six million, five hundred eighty-nine thousand, six hundred forty-three".