21412633 has 4 divisors (see below), whose sum is σ = 23359248. Its totient is φ = 19466020.

The previous prime is 21412631. The next prime is 21412649. The reversal of 21412633 is 33621412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21412633 - 2¹ = 21412631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21412631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973291 + ... + 973312.

It is an arithmetic number, because the mean of its divisors is an integer number (5839812).

Almost surely, 2^21412633 is an apocalyptic number.

It is an amenable number.

21412633 is a deficient number, since it is larger than the sum of its proper divisors (1946615).

21412633 is a wasteful number, since it uses less digits than its factorization.

21412633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946614.

The product of its digits is 864, while the sum is 22.

The square root of 21412633 is about 4627.3786315797. The cubic root of 21412633 is about 277.6877305577.

It can be divided in two parts, 2141 and 2633, that added together give a palindrome (4774).

The spelling of 21412633 in words is "twenty-one million, four hundred twelve thousand, six hundred thirty-three".