21346395 has 32 divisors (see below), whose sum is σ = 39232512. Its totient is φ = 9708672.

The previous prime is 21346387. The next prime is 21346397. The reversal of 21346395 is 59364312.

It is not a de Polignac number, because 21346395 - 2³ = 21346387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21346397) 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 31 ways as a sum of consecutive naturals, for example, 27229 + ... + 28001.

It is an arithmetic number, because the mean of its divisors is an integer number (1226016).

Almost surely, 2^21346395 is an apocalyptic number.

21346395 is a deficient number, since it is larger than the sum of its proper divisors (17886117).

21346395 is a wasteful number, since it uses less digits than its factorization.

21346395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 19440, while the sum is 33.

The square root of 21346395 is about 4620.2159040460. The cubic root of 21346395 is about 277.4011010287.

The spelling of 21346395 in words is "twenty-one million, three hundred forty-six thousand, three hundred ninety-five".