21714057 has 12 divisors (see below), whose sum is σ = 31407220. Its totient is φ = 14456448.

The previous prime is 21714053. The next prime is 21714059. The reversal of 21714057 is 75041712.

It can be written as a sum of positive squares in 2 ways, for example, as 1382976 + 20331081 = 1176^2 + 4509^2 .

It is not a de Polignac number, because 21714057 - 2² = 21714053 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 21714057.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714053) 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 11 ways as a sum of consecutive naturals, for example, 9093 + ... + 11229.

Almost surely, 2^21714057 is an apocalyptic number.

It is an amenable number.

21714057 is a deficient number, since it is larger than the sum of its proper divisors (9693163).

21714057 is a wasteful number, since it uses less digits than its factorization.

21714057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272 (or 3269 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 21714057 is about 4659.8344391191. The cubic root of 21714057 is about 278.9846601964.

Adding to 21714057 its reverse (75041712), we get a palindrome (96755769).

The spelling of 21714057 in words is "twenty-one million, seven hundred fourteen thousand, fifty-seven".