19725349444 has 12 divisors (see below), whose sum is σ = 35361297468. Its totient is φ = 9622121600.

The previous prime is 19725349439. The next prime is 19725349459. The reversal of 19725349444 is 44494352791.

It can be written as a sum of positive squares in 2 ways, for example, as 9862873344 + 9862476100 = 99312^2 + 99310^2 .

It is a super-2 number, since 2×19725349444² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19725349391 and 19725349400.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 60138097 + ... + 60138424.

It is an arithmetic number, because the mean of its divisors is an integer number (2946774789).

Almost surely, 2^19725349444 is an apocalyptic number.

It is an amenable number.

19725349444 is a deficient number, since it is larger than the sum of its proper divisors (15635948024).

19725349444 is a wasteful number, since it uses less digits than its factorization.

19725349444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120276566 (or 120276564 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 19725349444 in words is "nineteen billion, seven hundred twenty-five million, three hundred forty-nine thousand, four hundred forty-four".