20146343305 has 48 divisors (see below), whose sum is σ = 27807957072. Its totient is φ = 13986086400.

The previous prime is 20146343299. The next prime is 20146343309. The reversal of 20146343305 is 50334364102.

It can be written as a sum of positive squares in 8 ways, for example, as 6321522064 + 13824821241 = 79508^2 + 117579^2 .

It is not a de Polignac number, because 20146343305 - 2⁷ = 20146343177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20146343309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1177915 + ... + 1194895.

It is an arithmetic number, because the mean of its divisors is an integer number (579332439).

Almost surely, 2^20146343305 is an apocalyptic number.

It is an amenable number.

20146343305 is a deficient number, since it is larger than the sum of its proper divisors (7661613767).

20146343305 is a wasteful number, since it uses less digits than its factorization.

20146343305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17098 (or 17087 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The spelling of 20146343305 in words is "twenty billion, one hundred forty-six million, three hundred forty-three thousand, three hundred five".