20834719445 has 4 divisors (see below), whose sum is σ = 25001663340. Its totient is φ = 16667775552.

The previous prime is 20834719391. The next prime is 20834719447. The reversal of 20834719445 is 54491743802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3703574449 + 17131144996 = 60857^2 + 130886^2 .

It is a cyclic number.

It is not a de Polignac number, because 20834719445 - 2²⁸ = 20566283989 is a prime.

It is a super-2 number, since 2×20834719445² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20834719445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20834719447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083471940 + ... + 2083471949.

It is an arithmetic number, because the mean of its divisors is an integer number (6250415835).

Almost surely, 2^20834719445 is an apocalyptic number.

It is an amenable number.

20834719445 is a deficient number, since it is larger than the sum of its proper divisors (4166943895).

20834719445 is an equidigital number, since it uses as much as digits as its factorization.

20834719445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166943894.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 20834719445 in words is "twenty billion, eight hundred thirty-four million, seven hundred nineteen thousand, four hundred forty-five".