21514109 has 8 divisors (see below), whose sum is σ = 22111488. Its totient is φ = 20922640.

The previous prime is 21514091. The next prime is 21514117. The reversal of 21514109 is 90141512.

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 21514109 - 2¹⁶ = 21448573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514159) 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, 6479 + ... + 9219.

It is an arithmetic number, because the mean of its divisors is an integer number (2763936).

Almost surely, 2^21514109 is an apocalyptic number.

It is an amenable number.

21514109 is a deficient number, since it is larger than the sum of its proper divisors (597379).

21514109 is a wasteful number, since it uses less digits than its factorization.

21514109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 21514109 is about 4638.3304108267. The cubic root of 21514109 is about 278.1257001034.

The spelling of 21514109 in words is "twenty-one million, five hundred fourteen thousand, one hundred nine".