21314671 has 8 divisors (see below), whose sum is σ = 24387584. Its totient is φ = 18248760.

The previous prime is 21314663. The next prime is 21314687. The reversal of 21314671 is 17641312.

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 21314671 - 2³ = 21314663 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 (21314611) 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, 10726 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (3048448).

Almost surely, 2^21314671 is an apocalyptic number.

21314671 is the 2666-th hex number.

21314671 is a deficient number, since it is larger than the sum of its proper divisors (3072913).

21314671 is a wasteful number, since it uses less digits than its factorization.

21314671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501.

The product of its digits is 1008, while the sum is 25.

The square root of 21314671 is about 4616.7814546500. The cubic root of 21314671 is about 277.2636127761.

Adding to 21314671 its reverse (17641312), we get a palindrome (38955983).

It can be divided in two parts, 213 and 14671, that added together give a square (14884 = 122²).

The spelling of 21314671 in words is "twenty-one million, three hundred fourteen thousand, six hundred seventy-one".