21335354 has 4 divisors (see below), whose sum is σ = 32003034. Its totient is φ = 10667676.

The previous prime is 21335351. The next prime is 21335359. The reversal of 21335354 is 45353312.

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

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 769129 = 4535^2 + 877^2 .

It is not an unprimeable number, because it can be changed into a prime (21335351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333837 + ... + 5333840.

Almost surely, 2^21335354 is an apocalyptic number.

21335354 is a deficient number, since it is larger than the sum of its proper divisors (10667680).

21335354 is a wasteful number, since it uses less digits than its factorization.

21335354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667679.

The product of its digits is 5400, while the sum is 26.

The square root of 21335354 is about 4619.0208919207. The cubic root of 21335354 is about 277.3532660389.

Adding to 21335354 its reverse (45353312), we get a palindrome (66688666).

The spelling of 21335354 in words is "twenty-one million, three hundred thirty-five thousand, three hundred fifty-four".