21454452124224 has 112 divisors (see below), whose sum is σ = 65070172502016. Its totient is φ = 6111324172800.

The previous prime is 21454452124181. The next prime is 21454452124229. The reversal of 21454452124224 is 42242125445412.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (21454452124229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23668632 + ... + 24558359.

Almost surely, 2^{21454452124224} is an apocalyptic number.

21454452124224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21454452124224 is an abundant number, since it is smaller than the sum of its proper divisors (43615720377792).

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

21454452124224 is a wasteful number, since it uses less digits than its factorization.

21454452124224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48227344 (or 48227334 counting only the distinct ones).

The product of its digits is 819200, while the sum is 42.

Adding to 21454452124224 its reverse (42242125445412), we get a palindrome (63696577569636).

The spelling of 21454452124224 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred fifty-two million, one hundred twenty-four thousand, two hundred twenty-four".