21040059600 has 720 divisors, whose sum is σ = 89959194624. Its totient is φ = 4447872000.

The previous prime is 21040059581. The next prime is 21040059611. The reversal of 21040059600 is 695004012.

21040059600 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 0 + 0 + 59 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 17967015 + ... + 17968185.

Almost surely, 2^21040059600 is an apocalyptic number.

21040059600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21040059600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44979597312).

21040059600 is an abundant number, since it is smaller than the sum of its proper divisors (68919135024).

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

21040059600 is a wasteful number, since it uses less digits than its factorization.

21040059600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 21040059600 in words is "twenty-one billion, forty million, fifty-nine thousand, six hundred".