21886941 has 4 divisors (see below), whose sum is σ = 29182592. Its totient is φ = 14591292.

The previous prime is 21886927. The next prime is 21886979. The reversal of 21886941 is 14968812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21886941 - 2⁶ = 21886877 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 21886941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21886141) 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, 3647821 + ... + 3647826.

It is an arithmetic number, because the mean of its divisors is an integer number (7295648).

Almost surely, 2^21886941 is an apocalyptic number.

It is an amenable number.

21886941 is a deficient number, since it is larger than the sum of its proper divisors (7295651).

21886941 is an equidigital number, since it uses as much as digits as its factorization.

21886941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295650.

The product of its digits is 27648, while the sum is 39.

The square root of 21886941 is about 4678.3481059023. The cubic root of 21886941 is about 279.7231148908.

The spelling of 21886941 in words is "twenty-one million, eight hundred eighty-six thousand, nine hundred forty-one".