20555025424 has 10 divisors (see below), whose sum is σ = 39825361790. Its totient is φ = 10277512704.

The previous prime is 20555025409. The next prime is 20555025437. The reversal of 20555025424 is 42452055502.

It can be written as a sum of positive squares in only one way, i.e., 11292887824 + 9262137600 = 106268^2 + 96240^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20555025424.

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 as a sum of consecutive naturals, namely, 642344529 + ... + 642344560.

It is an arithmetic number, because the mean of its divisors is an integer number (3982536179).

Almost surely, 2^20555025424 is an apocalyptic number.

It is an amenable number.

20555025424 is a deficient number, since it is larger than the sum of its proper divisors (19270336366).

20555025424 is a wasteful number, since it uses less digits than its factorization.

20555025424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284689097 (or 1284689091 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 34.

The spelling of 20555025424 in words is "twenty billion, five hundred fifty-five million, twenty-five thousand, four hundred twenty-four".