21343034 has 12 divisors (see below), whose sum is σ = 33468666. Its totient is φ = 10207032.

The previous prime is 21343019. The next prime is 21343039. The reversal of 21343034 is 43034312.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 10220809 = 3335^2 + 3197^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21342997 and 21343015.

It is not an unprimeable number, because it can be changed into a prime (21343039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9029 + ... + 11144.

Almost surely, 2^21343034 is an apocalyptic number.

21343034 is a deficient number, since it is larger than the sum of its proper divisors (12125632).

21343034 is a wasteful number, since it uses less digits than its factorization.

21343034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20221 (or 20198 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 21343034 is about 4619.8521621368. The cubic root of 21343034 is about 277.3865412863.

Adding to 21343034 its reverse (43034312), we get a palindrome (64377346).

The spelling of 21343034 in words is "twenty-one million, three hundred forty-three thousand, thirty-four".