21496699 has 8 divisors (see below), whose sum is σ = 24597728. Its totient is φ = 18403200.

The previous prime is 21496679. The next prime is 21496703. The reversal of 21496699 is 99669412.

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

It is a cyclic number.

It is not a de Polignac number, because 21496699 - 2⁷ = 21496571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21496649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7129 + ... + 9685.

It is an arithmetic number, because the mean of its divisors is an integer number (3074716).

Almost surely, 2^21496699 is an apocalyptic number.

21496699 is a deficient number, since it is larger than the sum of its proper divisors (3101029).

21496699 is a wasteful number, since it uses less digits than its factorization.

21496699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765.

The product of its digits is 209952, while the sum is 46.

The square root of 21496699 is about 4636.4532780995. The cubic root of 21496699 is about 278.0506567109.

The spelling of 21496699 in words is "twenty-one million, four hundred ninety-six thousand, six hundred ninety-nine".