20848013 has 4 divisors (see below), whose sum is σ = 21566940. Its totient is φ = 20129088.

The previous prime is 20848007. The next prime is 20848019. The reversal of 20848013 is 31084802.

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

It is an interprime number because it is at equal distance from previous prime (20848007) and next prime (20848019).

It can be written as a sum of positive squares in 2 ways, for example, as 16467364 + 4380649 = 4058^2 + 2093^2 .

It is a cyclic number.

It is not a de Polignac number, because 20848013 - 2⁶ = 20847949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20848019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359420 + ... + 359477.

It is an arithmetic number, because the mean of its divisors is an integer number (5391735).

Almost surely, 2^20848013 is an apocalyptic number.

It is an amenable number.

20848013 is a deficient number, since it is larger than the sum of its proper divisors (718927).

20848013 is an equidigital number, since it uses as much as digits as its factorization.

20848013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718926.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20848013 is about 4565.9624396177. The cubic root of 20848013 is about 275.2252171561.

The spelling of 20848013 in words is "twenty million, eight hundred forty-eight thousand, thirteen".