21200534605404 has 144 divisors (see below), whose sum is σ = 69718754327040. Its totient is φ = 5267213550720.

The previous prime is 21200534605391. The next prime is 21200534605493. The reversal of 21200534605404 is 40450643500212.

21200534605404 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 0 + 5 + 3 + 4 + 605 + 40 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166199299 + ... + 166326810.

It is an arithmetic number, because the mean of its divisors is an integer number (484158016160).

Almost surely, 2^{21200534605404} is an apocalyptic number.

It is an amenable number.

21200534605404 is an abundant number, since it is smaller than the sum of its proper divisors (48518219721636).

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

21200534605404 is a wasteful number, since it uses less digits than its factorization.

21200534605404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332526160 (or 332526155 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 21200534605404 in words is "twenty-one trillion, two hundred billion, five hundred thirty-four million, six hundred five thousand, four hundred four".