21814495 has 8 divisors (see below), whose sum is σ = 26205984. Its totient is φ = 17432544.

The previous prime is 21814493. The next prime is 21814543. The reversal of 21814495 is 59441812.

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 21814495 - 2¹ = 21814493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21814495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814493) 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, 4422 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (3275748).

Almost surely, 2^21814495 is an apocalyptic number.

21814495 is a deficient number, since it is larger than the sum of its proper divisors (4391489).

21814495 is a wasteful number, since it uses less digits than its factorization.

21814495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769.

The product of its digits is 11520, while the sum is 34.

The square root of 21814495 is about 4670.5989979873. The cubic root of 21814495 is about 279.4141449452.

The spelling of 21814495 in words is "twenty-one million, eight hundred fourteen thousand, four hundred ninety-five".