20848505 has 8 divisors (see below), whose sum is σ = 25094472. Its totient is φ = 16627968.

The previous prime is 20848489. The next prime is 20848543. The reversal of 20848505 is 50584802.

It can be written as a sum of positive squares in 4 ways, for example, as 885481 + 19963024 = 941^2 + 4468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20848505 - 2⁴ = 20848489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4502 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (3136809).

Almost surely, 2^20848505 is an apocalyptic number.

It is an amenable number.

20848505 is a deficient number, since it is larger than the sum of its proper divisors (4245967).

20848505 is a wasteful number, since it uses less digits than its factorization.

20848505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12715.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 20848505 is about 4566.0163162214. The cubic root of 20848505 is about 275.2273821864.

The spelling of 20848505 in words is "twenty million, eight hundred forty-eight thousand, five hundred five".