21714307 has 6 divisors (see below), whose sum is σ = 21869988. Its totient is φ = 21559464.

The previous prime is 21714281. The next prime is 21714313. The reversal of 21714307 is 70341712.

It is a happy number.

It is not a de Polignac number, because 21714307 - 2¹¹ = 21712259 is a prime.

It is a super-2 number, since 2×21714307² = 943022256980498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21714317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76588 + ... + 76870.

It is an arithmetic number, because the mean of its divisors is an integer number (3644998).

Almost surely, 2^21714307 is an apocalyptic number.

21714307 is a deficient number, since it is larger than the sum of its proper divisors (155681).

21714307 is an frugal number, since it uses more digits than its factorization.

21714307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21714307 is about 4659.8612640292. The cubic root of 21714307 is about 278.9857308684.

The spelling of 21714307 in words is "twenty-one million, seven hundred fourteen thousand, three hundred seven".