20967345245 has 90 divisors (see below), whose sum is σ = 33320359926. Its totient is φ = 12619844160.

The previous prime is 20967345227. The next prime is 20967345299. The reversal of 20967345245 is 54254376902.

It can be written as a sum of positive squares in 5 ways, for example, as 3406589956 + 17560755289 = 58366^2 + 132517^2 .

It is not a de Polignac number, because 20967345245 - 2⁶ = 20967345181 is a prime.

It is a super-2 number, since 2×20967345245² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20967345245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 723011891 + ... + 723011919.

Almost surely, 2^20967345245 is an apocalyptic number.

It is an amenable number.

20967345245 is a deficient number, since it is larger than the sum of its proper divisors (12353014681).

20967345245 is an frugal number, since it uses more digits than its factorization.

20967345245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 20967345245 in words is "twenty billion, nine hundred sixty-seven million, three hundred forty-five thousand, two hundred forty-five".