21454333242 has 16 divisors (see below), whose sum is σ = 42919780512. Its totient is φ = 7149592080.

The previous prime is 21454333213. The next prime is 21454333247. The reversal of 21454333242 is 24233345412.

It is not an unprimeable number, because it can be changed into a prime (21454333247) 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, 437884 + ... + 484407.

It is an arithmetic number, because the mean of its divisors is an integer number (2682486282).

Almost surely, 2^21454333242 is an apocalyptic number.

21454333242 is an abundant number, since it is smaller than the sum of its proper divisors (21465447270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21454333242 is a wasteful number, since it uses less digits than its factorization.

21454333242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926173.

The product of its digits is 69120, while the sum is 33.

Adding to 21454333242 its reverse (24233345412), we get a palindrome (45687678654).

The spelling of 21454333242 in words is "twenty-one billion, four hundred fifty-four million, three hundred thirty-three thousand, two hundred forty-two".