21887341 has 8 divisors (see below), whose sum is σ = 25062080. Its totient is φ = 18724608.

The previous prime is 21887339. The next prime is 21887351. The reversal of 21887341 is 14378812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21887341 - 2¹ = 21887339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21887297 and 21887306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21887351) 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, 1330 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (3132760).

Almost surely, 2^21887341 is an apocalyptic number.

It is an amenable number.

21887341 is a deficient number, since it is larger than the sum of its proper divisors (3174739).

21887341 is an equidigital number, since it uses as much as digits as its factorization.

21887341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003.

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

The square root of 21887341 is about 4678.3908558392. The cubic root of 21887341 is about 279.7248189292.

The spelling of 21887341 in words is "twenty-one million, eight hundred eighty-seven thousand, three hundred forty-one".