21714081 has 8 divisors (see below), whose sum is σ = 29001504. Its totient is φ = 14451360.

The previous prime is 21714073. The next prime is 21714103. The reversal of 21714081 is 18041712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21714081 - 2³ = 21714073 is a prime.

It is a super-2 number, since 2×21714081² = 943002627349122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21714031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4015 + ... + 7716.

It is an arithmetic number, because the mean of its divisors is an integer number (3625188).

Almost surely, 2^21714081 is an apocalyptic number.

It is an amenable number.

21714081 is a deficient number, since it is larger than the sum of its proper divisors (7287423).

21714081 is a wasteful number, since it uses less digits than its factorization.

21714081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12351.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 21714081 is about 4659.8370143171. The cubic root of 21714081 is about 278.9847629813.

Adding to 21714081 its reverse (18041712), we get a palindrome (39755793).

The spelling of 21714081 in words is "twenty-one million, seven hundred fourteen thousand, eighty-one".