21433754 has 8 divisors (see below), whose sum is σ = 32538240. Its totient is φ = 10587676.

The previous prime is 21433751. The next prime is 21433771. The reversal of 21433754 is 45733412.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21433751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64394 + ... + 64725.

It is an arithmetic number, because the mean of its divisors is an integer number (4067280).

Almost surely, 2^21433754 is an apocalyptic number.

21433754 is a deficient number, since it is larger than the sum of its proper divisors (11104486).

21433754 is a wasteful number, since it uses less digits than its factorization.

21433754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129204.

The product of its digits is 10080, while the sum is 29.

The square root of 21433754 is about 4629.6602467136. The cubic root of 21433754 is about 277.7790024598.

The spelling of 21433754 in words is "twenty-one million, four hundred thirty-three thousand, seven hundred fifty-four".