21329692 has 6 divisors (see below), whose sum is σ = 37326968. Its totient is φ = 10664844.

The previous prime is 21329683. The next prime is 21329699. The reversal of 21329692 is 29692312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21329699) 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 as a sum of consecutive naturals, namely, 2666208 + ... + 2666215.

Almost surely, 2^21329692 is an apocalyptic number.

It is an amenable number.

21329692 is a deficient number, since it is larger than the sum of its proper divisors (15997276).

21329692 is a wasteful number, since it uses less digits than its factorization.

21329692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332427 (or 5332425 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 21329692 is about 4618.4079507986. The cubic root of 21329692 is about 277.3287290954.

The spelling of 21329692 in words is "twenty-one million, three hundred twenty-nine thousand, six hundred ninety-two".