21848011 has 4 divisors (see below), whose sum is σ = 21958000. Its totient is φ = 21738024.

The previous prime is 21847993. The next prime is 21848023. The reversal of 21848011 is 11084812.

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

It is a cyclic number.

It is not a de Polignac number, because 21848011 - 2¹¹ = 21845963 is a prime.

It is a super-2 number, since 2×21848011² = 954671169312242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21848041) 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, 54696 + ... + 55093.

It is an arithmetic number, because the mean of its divisors is an integer number (5489500).

Almost surely, 2^21848011 is an apocalyptic number.

21848011 is a deficient number, since it is larger than the sum of its proper divisors (109989).

21848011 is a wasteful number, since it uses less digits than its factorization.

21848011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109988.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 21848011 is about 4674.1855975132. The cubic root of 21848011 is about 279.5571699154.

The spelling of 21848011 in words is "twenty-one million, eight hundred forty-eight thousand, eleven".