21419694905 has 16 divisors (see below), whose sum is σ = 29606891520. Its totient is φ = 14572135872.

The previous prime is 21419694847. The next prime is 21419694929. The reversal of 21419694905 is 50949691412.

It is not a de Polignac number, because 21419694905 - 2⁸ = 21419694649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2404970 + ... + 2413859.

It is an arithmetic number, because the mean of its divisors is an integer number (1850430720).

Almost surely, 2^21419694905 is an apocalyptic number.

It is an amenable number.

21419694905 is a deficient number, since it is larger than the sum of its proper divisors (8187196615).

21419694905 is a wasteful number, since it uses less digits than its factorization.

21419694905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818968.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 21419694905 in words is "twenty-one billion, four hundred nineteen million, six hundred ninety-four thousand, nine hundred five".