21848013 has 12 divisors (see below), whose sum is σ = 34427328. Its totient is φ = 13241160.

The previous prime is 21847993. The next prime is 21848023. The reversal of 21848013 is 31084812.

It is not a de Polignac number, because 21848013 - 2⁸ = 21847757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21848023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110245 + ... + 110442.

It is an arithmetic number, because the mean of its divisors is an integer number (2868944).

Almost surely, 2^21848013 is an apocalyptic number.

It is an amenable number.

21848013 is a deficient number, since it is larger than the sum of its proper divisors (12579315).

21848013 is a wasteful number, since it uses less digits than its factorization.

21848013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220704 (or 220701 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 21848013 is about 4674.1858114542. The cubic root of 21848013 is about 279.5571784458.

The spelling of 21848013 in words is "twenty-one million, eight hundred forty-eight thousand, thirteen".