20121244419 has 32 divisors (see below), whose sum is σ = 28090944000. Its totient is φ = 12799607040.

The previous prime is 20121244379. The next prime is 20121244433. The reversal of 20121244419 is 91444212102.

It is not a de Polignac number, because 20121244419 - 2¹¹ = 20121242371 is a prime.

It is a super-2 number, since 2×20121244419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121244459) 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 31 ways as a sum of consecutive naturals, for example, 1437177 + ... + 1451109.

It is an arithmetic number, because the mean of its divisors is an integer number (877842000).

Almost surely, 2^20121244419 is an apocalyptic number.

20121244419 is a deficient number, since it is larger than the sum of its proper divisors (7969699581).

20121244419 is a wasteful number, since it uses less digits than its factorization.

20121244419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14235.

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 20121244419 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred nineteen".