21433101 has 16 divisors (see below), whose sum is σ = 29486784. Its totient is φ = 13837824.

The previous prime is 21433057. The next prime is 21433103. The reversal of 21433101 is 10133412.

It is not a de Polignac number, because 21433101 - 2⁷ = 21432973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433103) 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 in 15 ways as a sum of consecutive naturals, for example, 38910 + ... + 39456.

It is an arithmetic number, because the mean of its divisors is an integer number (1842924).

Almost surely, 2^21433101 is an apocalyptic number.

It is an amenable number.

21433101 is a deficient number, since it is larger than the sum of its proper divisors (8053683).

21433101 is a wasteful number, since it uses less digits than its factorization.

21433101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21433101 is about 4629.5897226428. The cubic root of 21433101 is about 277.7761814960.

Adding to 21433101 its reverse (10133412), we get a palindrome (31566513).

The spelling of 21433101 in words is "twenty-one million, four hundred thirty-three thousand, one hundred one".