21436113204450 has 216 divisors, whose sum is σ = 67801583264688. Its totient is φ = 4840650279360.

The previous prime is 21436113204439. The next prime is 21436113204461. The reversal of 21436113204450 is 5440231163412.

21436113204450 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 611 + 32 + 0 + 4 + 4 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21436113204439) and next prime (21436113204461).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 4026232 + ... + 7686531.

It is an arithmetic number, because the mean of its divisors is an integer number (313896218818).

Almost surely, 2^{21436113204450} is an apocalyptic number.

21436113204450 is an abundant number, since it is smaller than the sum of its proper divisors (46365470060238).

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

21436113204450 is a wasteful number, since it uses less digits than its factorization.

21436113204450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712878 (or 11712863 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 21436113204450 its reverse (5440231163412), we get a palindrome (26876344367862).

The spelling of 21436113204450 in words is "twenty-one trillion, four hundred thirty-six billion, one hundred thirteen million, two hundred four thousand, four hundred fifty".