21454242433 has 8 divisors (see below), whose sum is σ = 23280941376. Its totient is φ = 19652739600.

The previous prime is 21454242413. The next prime is 21454242443. The reversal of 21454242433 is 33424245412.

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

It is not a de Polignac number, because 21454242433 - 2²⁹ = 20917371521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21454242413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6297253 + ... + 6300658.

It is an arithmetic number, because the mean of its divisors is an integer number (2910117672).

Almost surely, 2^21454242433 is an apocalyptic number.

It is an amenable number.

21454242433 is a deficient number, since it is larger than the sum of its proper divisors (1826698943).

21454242433 is a wasteful number, since it uses less digits than its factorization.

21454242433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12598055.

The product of its digits is 92160, while the sum is 34.

Adding to 21454242433 its reverse (33424245412), we get a palindrome (54878487845).

It can be divided in two parts, 21 and 454242433, that added together give a palindrome (454242454).

The spelling of 21454242433 in words is "twenty-one billion, four hundred fifty-four million, two hundred forty-two thousand, four hundred thirty-three".