21419725600 has 144 divisors (see below), whose sum is σ = 64358255808. Its totient is φ = 6778967040.

The previous prime is 21419725597. The next prime is 21419725619. The reversal of 21419725600 is 652791412.

It is a self number, because there is not a number n which added to its sum of digits gives 21419725600.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 74314 + ... + 219913.

It is an arithmetic number, because the mean of its divisors is an integer number (446932332).

Almost surely, 2^21419725600 is an apocalyptic number.

21419725600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21419725600 is an abundant number, since it is smaller than the sum of its proper divisors (42938530208).

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

21419725600 is a wasteful number, since it uses less digits than its factorization.

21419725600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294267 (or 294254 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 21419725600 in words is "twenty-one billion, four hundred nineteen million, seven hundred twenty-five thousand, six hundred".