21319627 has 4 divisors (see below), whose sum is σ = 24365296. Its totient is φ = 18273960.

The previous prime is 21319609. The next prime is 21319633. The reversal of 21319627 is 72691312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21319627 - 2⁷ = 21319499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21319607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522824 + ... + 1522837.

It is an arithmetic number, because the mean of its divisors is an integer number (6091324).

Almost surely, 2^21319627 is an apocalyptic number.

21319627 is a deficient number, since it is larger than the sum of its proper divisors (3045669).

21319627 is an equidigital number, since it uses as much as digits as its factorization.

21319627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045668.

The product of its digits is 4536, while the sum is 31.

The square root of 21319627 is about 4617.3181610108. The cubic root of 21319627 is about 277.2851005106.

The spelling of 21319627 in words is "twenty-one million, three hundred nineteen thousand, six hundred twenty-seven".