21880343 has 8 divisors (see below), whose sum is σ = 24387120. Its totient is φ = 19509120.

The previous prime is 21880321. The next prime is 21880367. The reversal of 21880343 is 34308812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21880343 - 2⁶ = 21880279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21880373) 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, 33548 + ... + 34193.

It is an arithmetic number, because the mean of its divisors is an integer number (3048390).

Almost surely, 2^21880343 is an apocalyptic number.

21880343 is a deficient number, since it is larger than the sum of its proper divisors (2506777).

21880343 is a wasteful number, since it uses less digits than its factorization.

21880343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67777.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21880343 is about 4677.6428893194. The cubic root of 21880343 is about 279.6950037811.

The spelling of 21880343 in words is "twenty-one million, eight hundred eighty thousand, three hundred forty-three".