21887107 has 8 divisors (see below), whose sum is σ = 25133760. Its totient is φ = 18849960.

The previous prime is 21887081. The next prime is 21887119. The reversal of 21887107 is 70178812.

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 21887107 - 2⁷ = 21886979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21887167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52153 + ... + 52570.

It is an arithmetic number, because the mean of its divisors is an integer number (3141720).

Almost surely, 2^21887107 is an apocalyptic number.

21887107 is a deficient number, since it is larger than the sum of its proper divisors (3246653).

21887107 is a wasteful number, since it uses less digits than its factorization.

21887107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104753.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 21887107 is about 4678.3658471736. The cubic root of 21887107 is about 279.7238220693.

The spelling of 21887107 in words is "twenty-one million, eight hundred eighty-seven thousand, one hundred seven".