21340099 has 8 divisors (see below), whose sum is σ = 23316480. Its totient is φ = 19369800.

The previous prime is 21340093. The next prime is 21340141. The reversal of 21340099 is 99004312.

It is a happy number.

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 21340099 - 2³ = 21340091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21340091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9054 + ... + 11164.

It is an arithmetic number, because the mean of its divisors is an integer number (2914560).

Almost surely, 2^21340099 is an apocalyptic number.

21340099 is a deficient number, since it is larger than the sum of its proper divisors (1976381).

21340099 is a wasteful number, since it uses less digits than its factorization.

21340099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21340099 is about 4619.5345003582. The cubic root of 21340099 is about 277.3738257118.

The spelling of 21340099 in words is "twenty-one million, three hundred forty thousand, ninety-nine".