21419235 has 72 divisors (see below), whose sum is σ = 41570256. Its totient is φ = 10575360.

The previous prime is 21419207. The next prime is 21419267. The reversal of 21419235 is 53291412.

It is not a de Polignac number, because 21419235 - 2⁹ = 21418723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21419199 and 21419208.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 351105 + ... + 351165.

Almost surely, 2^21419235 is an apocalyptic number.

21419235 is a deficient number, since it is larger than the sum of its proper divisors (20151021).

21419235 is an equidigital number, since it uses as much as digits as its factorization.

21419235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 86 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 21419235 is about 4628.0919394498. The cubic root of 21419235 is about 277.7162667652.

The spelling of 21419235 in words is "twenty-one million, four hundred nineteen thousand, two hundred thirty-five".