19725905484 has 48 divisors (see below), whose sum is σ = 52330579840. Its totient is φ = 6422386320.

The previous prime is 19725905417. The next prime is 19725905489. The reversal of 19725905484 is 48450952791.

It is a happy number.

19725905484 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 5 + 90 + 548 + 4 = 666.

It is a super-2 number, since 2×19725905484² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19725905484.

It is not an unprimeable number, because it can be changed into a prime (19725905489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119162 + ... + 2128449.

Almost surely, 2^19725905484 is an apocalyptic number.

It is an amenable number.

19725905484 is an abundant number, since it is smaller than the sum of its proper divisors (32604674356).

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

19725905484 is a wasteful number, since it uses less digits than its factorization.

19725905484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247667 (or 4247659 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 19725905484 in words is "nineteen billion, seven hundred twenty-five million, nine hundred five thousand, four hundred eighty-four".