21363046 has 4 divisors (see below), whose sum is σ = 32044572. Its totient is φ = 10681522.

The previous prime is 21363037. The next prime is 21363047. The reversal of 21363046 is 64036312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21363046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21363047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340760 + ... + 5340763.

It is an arithmetic number, because the mean of its divisors is an integer number (8011143).

Almost surely, 2^21363046 is an apocalyptic number.

21363046 is a deficient number, since it is larger than the sum of its proper divisors (10681526).

21363046 is a wasteful number, since it uses less digits than its factorization.

21363046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10681525.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 21363046 is about 4622.0175248478. The cubic root of 21363046 is about 277.4732100859.

Adding to 21363046 its reverse (64036312), we get a palindrome (85399358).

The spelling of 21363046 in words is "twenty-one million, three hundred sixty-three thousand, forty-six".