21454454158 has 8 divisors (see below), whose sum is σ = 32222062152. Its totient is φ = 10713766776.

The previous prime is 21454454141. The next prime is 21454454159. The reversal of 21454454158 is 85145445412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454454159) 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, 6728160 + ... + 6731347.

It is an arithmetic number, because the mean of its divisors is an integer number (4027757769).

Almost surely, 2^21454454158 is an apocalyptic number.

21454454158 is a deficient number, since it is larger than the sum of its proper divisors (10767607994).

21454454158 is a wasteful number, since it uses less digits than its factorization.

21454454158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13460306.

The product of its digits is 512000, while the sum is 43.

The spelling of 21454454158 in words is "twenty-one billion, four hundred fifty-four million, four hundred fifty-four thousand, one hundred fifty-eight".