20896345 has 4 divisors (see below), whose sum is σ = 25075620. Its totient is φ = 16717072.

The previous prime is 20896321. The next prime is 20896367. The reversal of 20896345 is 54369802.

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 7733961 + 13162384 = 2781^2 + 3628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20896345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089630 + ... + 2089639.

It is an arithmetic number, because the mean of its divisors is an integer number (6268905).

Almost surely, 2^20896345 is an apocalyptic number.

It is an amenable number.

20896345 is a deficient number, since it is larger than the sum of its proper divisors (4179275).

20896345 is an equidigital number, since it uses as much as digits as its factorization.

20896345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179274.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20896345 is about 4571.2520166799. The cubic root of 20896345 is about 275.4377381114.

The spelling of 20896345 in words is "twenty million, eight hundred ninety-six thousand, three hundred forty-five".