21419115 has 16 divisors (see below), whose sum is σ = 35197728. Its totient is φ = 11114496.

The previous prime is 21419093. The next prime is 21419119. The reversal of 21419115 is 51191412.

It is a happy number.

It is not a de Polignac number, because 21419115 - 2⁷ = 21418987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21419119) 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 15 ways as a sum of consecutive naturals, for example, 18742 + ... + 19851.

It is an arithmetic number, because the mean of its divisors is an integer number (2199858).

Almost surely, 2^21419115 is an apocalyptic number.

21419115 is a deficient number, since it is larger than the sum of its proper divisors (13778613).

21419115 is a wasteful number, since it uses less digits than its factorization.

21419115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38638.

The product of its digits is 360, while the sum is 24.

The square root of 21419115 is about 4628.0789751256. The cubic root of 21419115 is about 277.7157481346.

The spelling of 21419115 in words is "twenty-one million, four hundred nineteen thousand, one hundred fifteen".