21880627 has 4 divisors (see below), whose sum is σ = 21958776. Its totient is φ = 21802480.

The previous prime is 21880591. The next prime is 21880643. The reversal of 21880627 is 72608812.

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 21880627 - 2¹⁹ = 21356339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21880592 and 21880601.

It is not an unprimeable number, because it can be changed into a prime (21880657) 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, 38653 + ... + 39214.

It is an arithmetic number, because the mean of its divisors is an integer number (5489694).

Almost surely, 2^21880627 is an apocalyptic number.

21880627 is a deficient number, since it is larger than the sum of its proper divisors (78149).

21880627 is an equidigital number, since it uses as much as digits as its factorization.

21880627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78148.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 21880627 is about 4677.6732463908. The cubic root of 21880627 is about 279.6962138937.

The spelling of 21880627 in words is "twenty-one million, eight hundred eighty thousand, six hundred twenty-seven".