21888119 has 8 divisors (see below), whose sum is σ = 23987712. Its totient is φ = 19806840.

The previous prime is 21888109. The next prime is 21888121. The reversal of 21888119 is 91188812.

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 21888119 - 2⁴ = 21888103 is a prime.

It is a super-2 number, since 2×21888119² = 958179506716322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21888109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (2998464).

Almost surely, 2^21888119 is an apocalyptic number.

21888119 is a deficient number, since it is larger than the sum of its proper divisors (2099593).

21888119 is a wasteful number, since it uses less digits than its factorization.

21888119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157.

The product of its digits is 9216, while the sum is 38.

The square root of 21888119 is about 4678.4740033477. The cubic root of 21888119 is about 279.7281332245.

The spelling of 21888119 in words is "twenty-one million, eight hundred eighty-eight thousand, one hundred nineteen".