21323134 has 24 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 8600256.

The previous prime is 21323129. The next prime is 21323153. The reversal of 21323134 is 43132312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4734 + ... + 8065.

It is an arithmetic number, because the mean of its divisors is an integer number (1641600).

Almost surely, 2^21323134 is an apocalyptic number.

21323134 is a deficient number, since it is larger than the sum of its proper divisors (18075266).

21323134 is a wasteful number, since it uses less digits than its factorization.

21323134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832 (or 12825 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 21323134 is about 4617.6979112974. The cubic root of 21323134 is about 277.3003038024.

Adding to 21323134 its reverse (43132312), we get a palindrome (64455446).

The spelling of 21323134 in words is "twenty-one million, three hundred twenty-three thousand, one hundred thirty-four".