20424855428 has 12 divisors (see below), whose sum is σ = 37846055772. Its totient is φ = 9611696640.

The previous prime is 20424855427. The next prime is 20424855461. The reversal of 20424855428 is 82455842402.

It can be written as a sum of positive squares in 2 ways, for example, as 13634765824 + 6790089604 = 116768^2 + 82402^2 .

It is not an unprimeable number, because it can be changed into a prime (20424855421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150182693 + ... + 150182828.

It is an arithmetic number, because the mean of its divisors is an integer number (3153837981).

Almost surely, 2^20424855428 is an apocalyptic number.

It is an amenable number.

20424855428 is a deficient number, since it is larger than the sum of its proper divisors (17421200344).

20424855428 is a wasteful number, since it uses less digits than its factorization.

20424855428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300365542 (or 300365540 counting only the distinct ones).

The product of its (nonzero) digits is 819200, while the sum is 44.

The spelling of 20424855428 in words is "twenty billion, four hundred twenty-four million, eight hundred fifty-five thousand, four hundred twenty-eight".