20000936641 has 4 divisors (see below), whose sum is σ = 22858213312. Its totient is φ = 17143659972.

The previous prime is 20000936629. The next prime is 20000936671. The reversal of 20000936641 is 14663900002.

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 not a de Polignac number, because 20000936641 - 2⁷ = 20000936513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000936671) 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, 1428638325 + ... + 1428638338.

It is an arithmetic number, because the mean of its divisors is an integer number (5714553328).

Almost surely, 2^20000936641 is an apocalyptic number.

It is an amenable number.

20000936641 is a deficient number, since it is larger than the sum of its proper divisors (2857276671).

20000936641 is an equidigital number, since it uses as much as digits as its factorization.

20000936641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857276670.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 20000936641 in words is "twenty billion, nine hundred thirty-six thousand, six hundred forty-one".