21232342454 has 8 divisors (see below), whose sum is σ = 31991332800. Its totient is φ = 10568564856.

The previous prime is 21232342409. The next prime is 21232342493. The reversal of 21232342454 is 45424323212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21232342454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23802629 + ... + 23803520.

It is an arithmetic number, because the mean of its divisors is an integer number (3998916600).

Almost surely, 2^21232342454 is an apocalyptic number.

21232342454 is a deficient number, since it is larger than the sum of its proper divisors (10758990346).

21232342454 is a wasteful number, since it uses less digits than its factorization.

21232342454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47606374.

The product of its digits is 46080, while the sum is 32.

Adding to 21232342454 its reverse (45424323212), we get a palindrome (66656665666).

The spelling of 21232342454 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty-two thousand, four hundred fifty-four".