21346191 has 12 divisors (see below), whose sum is σ = 31031832. Its totient is φ = 14139216.

The previous prime is 21346183. The next prime is 21346201. The reversal of 21346191 is 19164312.

It is not a de Polignac number, because 21346191 - 2³ = 21346183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21346181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6141 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (2585986).

Almost surely, 2^21346191 is an apocalyptic number.

21346191 is a deficient number, since it is larger than the sum of its proper divisors (9685641).

21346191 is a wasteful number, since it uses less digits than its factorization.

21346191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270 (or 15267 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 21346191 is about 4620.1938271029. The cubic root of 21346191 is about 277.4002173509.

The spelling of 21346191 in words is "twenty-one million, three hundred forty-six thousand, one hundred ninety-one".