21469306 has 8 divisors (see below), whose sum is σ = 32230080. Its totient is φ = 10725948.

The previous prime is 21469303. The next prime is 21469307. The reversal of 21469306 is 60396412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21469306² = 921862200243272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21469303) 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 3 ways as a sum of consecutive naturals, for example, 636 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (4028760).

Almost surely, 2^21469306 is an apocalyptic number.

21469306 is a deficient number, since it is larger than the sum of its proper divisors (10760774).

21469306 is a wasteful number, since it uses less digits than its factorization.

21469306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8708.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 21469306 is about 4633.4982464656. The cubic root of 21469306 is about 277.9325009079.

The spelling of 21469306 in words is "twenty-one million, four hundred sixty-nine thousand, three hundred six".