21464206 has 4 divisors (see below), whose sum is σ = 32196312. Its totient is φ = 10732102.

The previous prime is 21464203. The next prime is 21464207. The reversal of 21464206 is 60246412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464203) 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, 5366050 + ... + 5366053.

It is an arithmetic number, because the mean of its divisors is an integer number (8049078).

Almost surely, 2^21464206 is an apocalyptic number.

21464206 is a deficient number, since it is larger than the sum of its proper divisors (10732106).

21464206 is a wasteful number, since it uses less digits than its factorization.

21464206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10732105.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 21464206 is about 4632.9478736545. The cubic root of 21464206 is about 277.9104916884.

The spelling of 21464206 in words is "twenty-one million, four hundred sixty-four thousand, two hundred six".