21229349480 has 48 divisors (see below), whose sum is σ = 47954595780. Its totient is φ = 8458349312.

The previous prime is 21229349461. The next prime is 21229349483. The reversal of 21229349480 is 8494392212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21229072804 + 276676 = 145702^2 + 526^2 .

It is not an unprimeable number, because it can be changed into a prime (21229349483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2762924 + ... + 2770596.

Almost surely, 2^21229349480 is an apocalyptic number.

21229349480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21229349480 is an abundant number, since it is smaller than the sum of its proper divisors (26725246300).

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

21229349480 is an equidigital number, since it uses as much as digits as its factorization.

21229349480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210 (or 7943 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 21229349480 in words is "twenty-one billion, two hundred twenty-nine million, three hundred forty-nine thousand, four hundred eighty".