20424049056 has 72 divisors (see below), whose sum is σ = 58307096484. Its totient is φ = 6781501440.

The previous prime is 20424049049. The next prime is 20424049103. The reversal of 20424049056 is 65094042402.

It can be written as a sum of positive squares in 2 ways, for example, as 19762736400 + 661312656 = 140580^2 + 25716^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×20424049056² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20424049056.

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 11 ways as a sum of consecutive naturals, for example, 63955 + ... + 211986.

Almost surely, 2^20424049056 is an apocalyptic number.

It is an amenable number.

20424049056 is an abundant number, since it is smaller than the sum of its proper divisors (37883047428).

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

20424049056 is a wasteful number, since it uses less digits than its factorization.

20424049056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276214 (or 276203 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 20424049056 in words is "twenty billion, four hundred twenty-four million, forty-nine thousand, fifty-six".