21363470 has 8 divisors (see below), whose sum is σ = 38454264. Its totient is φ = 8545384.

The previous prime is 21363469. The next prime is 21363497. The reversal of 21363470 is 7436312.

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

It is a Curzon number.

It is a congruent number.

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, 1068164 + ... + 1068183.

It is an arithmetic number, because the mean of its divisors is an integer number (4806783).

Almost surely, 2^21363470 is an apocalyptic number.

21363470 is a deficient number, since it is larger than the sum of its proper divisors (17090794).

21363470 is a wasteful number, since it uses less digits than its factorization.

21363470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136354.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 21363470 is about 4622.0633920361. The cubic root of 21363470 is about 277.4750457770.

Adding to 21363470 its reverse (7436312), we get a palindrome (28799782).

The spelling of 21363470 in words is "twenty-one million, three hundred sixty-three thousand, four hundred seventy".