21454525230220 has 48 divisors (see below), whose sum is σ = 45072587917728. Its totient is φ = 8578365985280.

The previous prime is 21454525230217. The next prime is 21454525230241. The reversal of 21454525230220 is 2203252545412.

It is a self number, because there is not a number n which added to its sum of digits gives 21454525230220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886428639 + ... + 886452841.

It is an arithmetic number, because the mean of its divisors is an integer number (939012248286).

Almost surely, 2^{21454525230220} is an apocalyptic number.

21454525230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21454525230220 is an abundant number, since it is smaller than the sum of its proper divisors (23618062687508).

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

21454525230220 is a wasteful number, since it uses less digits than its factorization.

21454525230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40170 (or 40168 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 21454525230220 its reverse (2203252545412), we get a palindrome (23657777775632).

The spelling of 21454525230220 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred twenty-five million, two hundred thirty thousand, two hundred twenty".