21441727400 has 48 divisors (see below), whose sum is σ = 50293237500. Its totient is φ = 8500782080.

The previous prime is 21441727397. The next prime is 21441727429. The reversal of 21441727400 is 472714412.

It can be written as a sum of positive squares in 6 ways, for example, as 50324836 + 21391402564 = 7094^2 + 146258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451775 + ... + 496974.

Almost surely, 2^21441727400 is an apocalyptic number.

21441727400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441727400 is an abundant number, since it is smaller than the sum of its proper divisors (28851510100).

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

21441727400 is a wasteful number, since it uses less digits than its factorization.

21441727400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948878 (or 948869 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The spelling of 21441727400 in words is "twenty-one billion, four hundred forty-one million, seven hundred twenty-seven thousand, four hundred".