21364562 has 8 divisors (see below), whose sum is σ = 33440256. Its totient is φ = 10217812.

The previous prime is 21364547. The next prime is 21364591. The reversal of 21364562 is 26546312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232178 + ... + 232269.

It is an arithmetic number, because the mean of its divisors is an integer number (4180032).

Almost surely, 2^21364562 is an apocalyptic number.

21364562 is a deficient number, since it is larger than the sum of its proper divisors (12075694).

21364562 is a wasteful number, since it uses less digits than its factorization.

21364562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464472.

The product of its digits is 8640, while the sum is 29.

The square root of 21364562 is about 4622.1815195857. The cubic root of 21364562 is about 277.4797734358.

The spelling of 21364562 in words is "twenty-one million, three hundred sixty-four thousand, five hundred sixty-two".