20395432907 has 4 divisors (see below), whose sum is σ = 20829378336. Its totient is φ = 19961487480.

The previous prime is 20395432891. The next prime is 20395432913. The reversal of 20395432907 is 70923459302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20395432907 - 2⁴ = 20395432891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20395432957) 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, 216972644 + ... + 216972737.

It is an arithmetic number, because the mean of its divisors is an integer number (5207344584).

Almost surely, 2^20395432907 is an apocalyptic number.

20395432907 is a deficient number, since it is larger than the sum of its proper divisors (433945429).

20395432907 is an equidigital number, since it uses as much as digits as its factorization.

20395432907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433945428.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 20395432907 in words is "twenty billion, three hundred ninety-five million, four hundred thirty-two thousand, nine hundred seven".