21346064 has 10 divisors (see below), whose sum is σ = 41358030. Its totient is φ = 10673024.

The previous prime is 21346043. The next prime is 21346069. The reversal of 21346064 is 46064312.

It can be written as a sum of positive squares in only one way, i.e., 20976400 + 369664 = 4580^2 + 608^2 .

It is not an unprimeable number, because it can be changed into a prime (21346069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667049 + ... + 667080.

It is an arithmetic number, because the mean of its divisors is an integer number (4135803).

Almost surely, 2^21346064 is an apocalyptic number.

It is an amenable number.

21346064 is a deficient number, since it is larger than the sum of its proper divisors (20011966).

21346064 is a wasteful number, since it uses less digits than its factorization.

21346064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334137 (or 1334131 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 21346064 is about 4620.1800830704. The cubic root of 21346064 is about 277.3996672154.

The spelling of 21346064 in words is "twenty-one million, three hundred forty-six thousand, sixty-four".