21461433 has 8 divisors (see below), whose sum is σ = 32703168. Its totient is φ = 12263664.

The previous prime is 21461417. The next prime is 21461437. The reversal of 21461433 is 33416412.

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

It is not a de Polignac number, because 21461433 - 2⁴ = 21461417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21461437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510966 + ... + 511007.

It is an arithmetic number, because the mean of its divisors is an integer number (4087896).

Almost surely, 2^21461433 is an apocalyptic number.

It is an amenable number.

21461433 is a deficient number, since it is larger than the sum of its proper divisors (11241735).

21461433 is a wasteful number, since it uses less digits than its factorization.

21461433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021983.

The product of its digits is 1728, while the sum is 24.

The square root of 21461433 is about 4632.6485944867. The cubic root of 21461433 is about 277.8985232515.

Adding to 21461433 its reverse (33416412), we get a palindrome (54877845).

The spelling of 21461433 in words is "twenty-one million, four hundred sixty-one thousand, four hundred thirty-three".