20420434433444 has 12 divisors (see below), whose sum is σ = 35757171750300. Its totient is φ = 10204099647648.

The previous prime is 20420434433401. The next prime is 20420434433467. The reversal of 20420434433444 is 44433443402402.

It can be written as a sum of positive squares in 2 ways, for example, as 9330202393444 + 11090232040000 = 3054538^2 + 3330200^2 .

It is a super-2 number, since 2×20420434433444² (a number of 27 digits) contains 22 as substring.

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, 1529384759 + ... + 1529398110.

It is an arithmetic number, because the mean of its divisors is an integer number (2979764312525).

Almost surely, 2^{20420434433444} is an apocalyptic number.

It is an amenable number.

20420434433444 is a deficient number, since it is larger than the sum of its proper divisors (15336737316856).

20420434433444 is a wasteful number, since it uses less digits than its factorization.

20420434433444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058784542 (or 3058784540 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 41.

Adding to 20420434433444 its reverse (44433443402402), we get a palindrome (64853877835846).

The spelling of 20420434433444 in words is "twenty trillion, four hundred twenty billion, four hundred thirty-four million, four hundred thirty-three thousand, four hundred forty-four".