21041361426 has 8 divisors (see below), whose sum is σ = 42082722864. Its totient is φ = 7013787140.

The previous prime is 21041361409. The next prime is 21041361437. The reversal of 21041361426 is 62416314012.

It is a sphenic number, since it is the product of 3 distinct primes.

21041361426 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21041361393 and 21041361402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753446780 + ... + 1753446791.

It is an arithmetic number, because the mean of its divisors is an integer number (5260340358).

Almost surely, 2^21041361426 is an apocalyptic number.

21041361426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21041361426 is a wasteful number, since it uses less digits than its factorization.

21041361426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506893576.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 21041361426 its reverse (62416314012), we get a palindrome (83457675438).

The spelling of 21041361426 in words is "twenty-one billion, forty-one million, three hundred sixty-one thousand, four hundred twenty-six".