21955341 has 8 divisors (see below), whose sum is σ = 29396224. Its totient is φ = 14575680.

The previous prime is 21955337. The next prime is 21955343. The reversal of 21955341 is 14355912.

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

It is not a de Polignac number, because 21955341 - 2² = 21955337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21955299 and 21955308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21955343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14461 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (3674528).

Almost surely, 2^21955341 is an apocalyptic number.

It is an amenable number.

21955341 is a deficient number, since it is larger than the sum of its proper divisors (7440883).

21955341 is a wasteful number, since it uses less digits than its factorization.

21955341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30611.

The product of its digits is 5400, while the sum is 30.

The square root of 21955341 is about 4685.6526759887. The cubic root of 21955341 is about 280.0142042114.

The spelling of 21955341 in words is "twenty-one million, nine hundred fifty-five thousand, three hundred forty-one".