21300561426 has 16 divisors (see below), whose sum is σ = 42609895200. Its totient is φ = 7098725088.

The previous prime is 21300561421. The next prime is 21300561437. The reversal of 21300561426 is 62416500312.

It is a junction number, because it is equal to n+sod(n) for n = 21300561393 and 21300561402.

It is not an unprimeable number, because it can be changed into a prime (21300561421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 333736 + ... + 392403.

It is an arithmetic number, because the mean of its divisors is an integer number (2663118450).

Almost surely, 2^21300561426 is an apocalyptic number.

21300561426 is an abundant number, since it is smaller than the sum of its proper divisors (21309333774).

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

21300561426 is a wasteful number, since it uses less digits than its factorization.

21300561426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731033.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 21300561426 in words is "twenty-one billion, three hundred million, five hundred sixty-one thousand, four hundred twenty-six".