21111794803 has 12 divisors (see below), whose sum is σ = 23643373824. Its totient is φ = 18830411600.

The previous prime is 21111794797. The next prime is 21111794807. The reversal of 21111794803 is 30849711112.

It is not a de Polignac number, because 21111794803 - 2¹³ = 21111786611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111794807) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1639603 + ... + 1652428.

It is an arithmetic number, because the mean of its divisors is an integer number (1970281152).

Almost surely, 2^21111794803 is an apocalyptic number.

21111794803 is a deficient number, since it is larger than the sum of its proper divisors (2531579021).

21111794803 is a wasteful number, since it uses less digits than its factorization.

21111794803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292106 (or 3292095 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 21111794803 in words is "twenty-one billion, one hundred eleven million, seven hundred ninety-four thousand, eight hundred three".