21846113 has 12 divisors (see below), whose sum is σ = 23245908. Its totient is φ = 20523360.

The previous prime is 21846101. The next prime is 21846131. The reversal of 21846113 is 31164812.

It can be written as a sum of positive squares in 2 ways, for example, as 12061729 + 9784384 = 3473^2 + 3128^2 .

It is not a de Polignac number, because 21846113 - 2¹⁴ = 21829729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21846133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31931 + ... + 32607.

It is an arithmetic number, because the mean of its divisors is an integer number (1937159).

Almost surely, 2^21846113 is an apocalyptic number.

21846113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21846113 is a deficient number, since it is larger than the sum of its proper divisors (1399795).

21846113 is an equidigital number, since it uses as much as digits as its factorization.

21846113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 761 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 21846113 is about 4673.9825630826. The cubic root of 21846113 is about 279.5490743673.

The spelling of 21846113 in words is "twenty-one million, eight hundred forty-six thousand, one hundred thirteen".