20213433444 has 96 divisors (see below), whose sum is σ = 49675691520. Its totient is φ = 6389563392.

The previous prime is 20213433433. The next prime is 20213433497. The reversal of 20213433444 is 44433431202.

It is a happy number.

It is a super-2 number, since 2×20213433444² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5361192 + ... + 5364960.

It is an arithmetic number, because the mean of its divisors is an integer number (517455120).

Almost surely, 2^20213433444 is an apocalyptic number.

It is an amenable number.

20213433444 is an abundant number, since it is smaller than the sum of its proper divisors (29462258076).

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

20213433444 is a wasteful number, since it uses less digits than its factorization.

20213433444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 20213433444 its reverse (44433431202), we get a palindrome (64646864646).

The spelling of 20213433444 in words is "twenty billion, two hundred thirteen million, four hundred thirty-three thousand, four hundred forty-four".