20345949307 has 4 divisors (see below), whose sum is σ = 20346396336. Its totient is φ = 20345502280.

The previous prime is 20345949269. The next prime is 20345949331. The reversal of 20345949307 is 70394954302.

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 20345949307 - 2²³ = 20337560699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345959307) 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, 146368 + ... + 249229.

It is an arithmetic number, because the mean of its divisors is an integer number (5086599084).

Almost surely, 2^20345949307 is an apocalyptic number.

20345949307 is a deficient number, since it is larger than the sum of its proper divisors (447029).

20345949307 is an equidigital number, since it uses as much as digits as its factorization.

20345949307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447028.

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 20345949307 in words is "twenty billion, three hundred forty-five million, nine hundred forty-nine thousand, three hundred seven".