21202143543480 has 64 divisors (see below), whose sum is σ = 65157807002400. Its totient is φ = 5516004823040.

The previous prime is 21202143543467. The next prime is 21202143543487. The reversal of 21202143543480 is 8434534120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202143543487) 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, 2154684465 + ... + 2154694304.

Almost surely, 2^{21202143543480} is an apocalyptic number.

21202143543480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202143543480 is an abundant number, since it is smaller than the sum of its proper divisors (43955663458920).

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

21202143543480 is a wasteful number, since it uses less digits than its factorization.

21202143543480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309378824 (or 4309378820 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

Adding to 21202143543480 its reverse (8434534120212), we get a palindrome (29636677663692).

The spelling of 21202143543480 in words is "twenty-one trillion, two hundred two billion, one hundred forty-three million, five hundred forty-three thousand, four hundred eighty".