21433454 has 16 divisors (see below), whose sum is σ = 36855648. Its totient is φ = 9157632.

The previous prime is 21433453. The next prime is 21433469. The reversal of 21433454 is 45433412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433453) 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, 2774 + ... + 7110.

It is an arithmetic number, because the mean of its divisors is an integer number (2303478).

Almost surely, 2^21433454 is an apocalyptic number.

21433454 is a deficient number, since it is larger than the sum of its proper divisors (15422194).

21433454 is a wasteful number, since it uses less digits than its factorization.

21433454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699.

The product of its digits is 5760, while the sum is 26.

The square root of 21433454 is about 4629.6278468145. The cubic root of 21433454 is about 277.7777064652. Note that the first 4 decimals are identical.

Adding to 21433454 its reverse (45433412), we get a palindrome (66866866).

The spelling of 21433454 in words is "twenty-one million, four hundred thirty-three thousand, four hundred fifty-four".