21454167153 has 8 divisors (see below), whose sum is σ = 28606330368. Its totient is φ = 14302391024.

The previous prime is 21454167139. The next prime is 21454167181. The reversal of 21454167153 is 35176145412.

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

It is a cyclic number.

It is not a de Polignac number, because 21454167153 - 2⁵ = 21454167121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21454167193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77275 + ... + 221087.

It is an arithmetic number, because the mean of its divisors is an integer number (3575791296).

Almost surely, 2^21454167153 is an apocalyptic number.

It is an amenable number.

21454167153 is a deficient number, since it is larger than the sum of its proper divisors (7152163215).

21454167153 is a wasteful number, since it uses less digits than its factorization.

21454167153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193543.

The product of its digits is 100800, while the sum is 39.

The spelling of 21454167153 in words is "twenty-one billion, four hundred fifty-four million, one hundred sixty-seven thousand, one hundred fifty-three".