20430344641 has 8 divisors (see below), whose sum is σ = 23825475200. Its totient is φ = 17511723684.

The previous prime is 20430344591. The next prime is 20430344651. The reversal of 20430344641 is 14644303402.

It is not a de Polignac number, because 20430344641 - 2¹⁷ = 20430213569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430344651) 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, 29781501 + ... + 29782186.

It is an arithmetic number, because the mean of its divisors is an integer number (2978184400).

Almost surely, 2^20430344641 is an apocalyptic number.

It is an amenable number.

20430344641 is a deficient number, since it is larger than the sum of its proper divisors (3395130559).

20430344641 is an frugal number, since it uses more digits than its factorization.

20430344641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59563708 (or 59563694 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The spelling of 20430344641 in words is "twenty billion, four hundred thirty million, three hundred forty-four thousand, six hundred forty-one".