21434299 has 16 divisors (see below), whose sum is σ = 23541760. Its totient is φ = 19440000.

The previous prime is 21434293. The next prime is 21434323. The reversal of 21434299 is 99243412.

It is a cyclic number.

It is not a de Polignac number, because 21434299 - 2¹⁵ = 21401531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21434293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88819 + ... + 89059.

It is an arithmetic number, because the mean of its divisors is an integer number (1471360).

Almost surely, 2^21434299 is an apocalyptic number.

21434299 is a deficient number, since it is larger than the sum of its proper divisors (2107461).

21434299 is a wasteful number, since it uses less digits than its factorization.

21434299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 15552, while the sum is 34.

The square root of 21434299 is about 4629.7191059502. The cubic root of 21434299 is about 277.7813568191.

The spelling of 21434299 in words is "twenty-one million, four hundred thirty-four thousand, two hundred ninety-nine".