21450611105426 has 8 divisors (see below), whose sum is σ = 32175936580464. Its totient is φ = 10725298911940.

The previous prime is 21450611105401. The next prime is 21450611105447. The reversal of 21450611105426 is 62450111605412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21450611105426.

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 3 ways as a sum of consecutive naturals, for example, 3612041 + ... + 7479843.

It is an arithmetic number, because the mean of its divisors is an integer number (4021992072558).

Almost surely, 2^{21450611105426} is an apocalyptic number.

21450611105426 is a deficient number, since it is larger than the sum of its proper divisors (10725325475038).

21450611105426 is a wasteful number, since it uses less digits than its factorization.

21450611105426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640776.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 21450611105426 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, one hundred five thousand, four hundred twenty-six".