21880347 has 8 divisors (see below), whose sum is σ = 29885520. Its totient is φ = 14231040.

The previous prime is 21880321. The next prime is 21880367. The reversal of 21880347 is 74308812.

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

It is not a de Polignac number, because 21880347 - 2¹² = 21876251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21880307) 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, 88822 + ... + 89067.

It is an arithmetic number, because the mean of its divisors is an integer number (3735690).

Almost surely, 2^21880347 is an apocalyptic number.

21880347 is a deficient number, since it is larger than the sum of its proper divisors (8005173).

21880347 is a wasteful number, since it uses less digits than its factorization.

21880347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177933.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 21880347 is about 4677.6433168851. The cubic root of 21880347 is about 279.6950208250.

The spelling of 21880347 in words is "twenty-one million, eight hundred eighty thousand, three hundred forty-seven".