21092699 has 8 divisors (see below), whose sum is σ = 22540320. Its totient is φ = 19668096.

The previous prime is 21092683. The next prime is 21092711. The reversal of 21092699 is 99629012.

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 21092699 - 2⁴ = 21092683 is a prime.

It is a super-2 number, since 2×21092699² = 889803902209202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21092629) 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 7 ways as a sum of consecutive naturals, for example, 3839 + ... + 7544.

It is an arithmetic number, because the mean of its divisors is an integer number (2817540).

Almost surely, 2^21092699 is an apocalyptic number.

21092699 is a deficient number, since it is larger than the sum of its proper divisors (1447621).

21092699 is a wasteful number, since it uses less digits than its factorization.

21092699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11509.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 21092699 is about 4592.6788479057. The cubic root of 21092699 is about 276.2977733830.

The spelling of 21092699 in words is "twenty-one million, ninety-two thousand, six hundred ninety-nine".