21474133 has 2 divisors, whose sum is σ = 21474134. Its totient is φ = 21474132.

The previous prime is 21474121. The next prime is 21474137. The reversal of 21474133 is 33147412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 1340964 = 4487^2 + 1158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21474133 is a prime.

It is a super-2 number, since 2×21474133² = 922276776203378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21474098 and 21474107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21474137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10737066 + 10737067.

It is an arithmetic number, because the mean of its divisors is an integer number (10737067).

Almost surely, 2^21474133 is an apocalyptic number.

It is an amenable number.

21474133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21474133 is an equidigital number, since it uses as much as digits as its factorization.

21474133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 21474133 is about 4634.0190979322. The cubic root of 21474133 is about 277.9533287765.

It can be divided in two parts, 214 and 74133, that added together give a palindrome (74347).

The spelling of 21474133 in words is "twenty-one million, four hundred seventy-four thousand, one hundred thirty-three".