21354699 has 8 divisors (see below), whose sum is σ = 28501200. Its totient is φ = 14222336.

The previous prime is 21354667. The next prime is 21354721. The reversal of 21354699 is 99645312.

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 21354699 - 2⁵ = 21354667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21354659) 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, 727 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (3562650).

Almost surely, 2^21354699 is an apocalyptic number.

21354699 is a deficient number, since it is larger than the sum of its proper divisors (7146501).

21354699 is a wasteful number, since it uses less digits than its factorization.

21354699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069.

The product of its digits is 58320, while the sum is 39.

The square root of 21354699 is about 4621.1144759679. The cubic root of 21354699 is about 277.4370671346.

The spelling of 21354699 in words is "twenty-one million, three hundred fifty-four thousand, six hundred ninety-nine".