20595948641 has 4 divisors (see below), whose sum is σ = 20693559984. Its totient is φ = 20498337300.

The previous prime is 20595948623. The next prime is 20595948691. The reversal of 20595948641 is 14684959502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20595948641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20595948601) 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, 48805355 + ... + 48805776.

It is an arithmetic number, because the mean of its divisors is an integer number (5173389996).

Almost surely, 2^20595948641 is an apocalyptic number.

It is an amenable number.

20595948641 is a deficient number, since it is larger than the sum of its proper divisors (97611343).

20595948641 is an equidigital number, since it uses as much as digits as its factorization.

20595948641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97611342.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 20595948641 in words is "twenty billion, five hundred ninety-five million, nine hundred forty-eight thousand, six hundred forty-one".