20444440424 has 8 divisors (see below), whose sum is σ = 38333325810. Its totient is φ = 10222220208.

The previous prime is 20444440417. The next prime is 20444440469. The reversal of 20444440424 is 42404444402.

It can be written as a sum of positive squares in only one way, i.e., 11819603524 + 8624836900 = 108718^2 + 92870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277777519 + ... + 1277777534.

Almost surely, 2^20444440424 is an apocalyptic number.

It is an amenable number.

20444440424 is a deficient number, since it is larger than the sum of its proper divisors (17888885386).

20444440424 is a wasteful number, since it uses less digits than its factorization.

20444440424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555555059 (or 2555555055 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 20444440424 its reverse (42404444402), we get a palindrome (62848884826).

The spelling of 20444440424 in words is "twenty billion, four hundred forty-four million, four hundred forty thousand, four hundred twenty-four".