19473103911556 has 9 divisors (see below), whose sum is σ = 34077947290149. Its totient is φ = 9736547542944.

The previous prime is 19473103911461. The next prime is 19473103911557. The reversal of 19473103911556 is 65511930137491.

The square root of 19473103911556 is 4412834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3338550208900 + 16134553702656 = 1827170^2 + 4016784^2 .

It is a super-2 number, since 2×19473103911556² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19473103911497 and 19473103911506.

It is not an unprimeable number, because it can be changed into a prime (19473103911557) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7722460 + ... + 9928876.

Almost surely, 2^{19473103911556} is an apocalyptic number.

19473103911556 is the 4412834-th square number.

It is an amenable number.

19473103911556 is a deficient number, since it is larger than the sum of its proper divisors (14604843378593).

19473103911556 is an frugal number, since it uses more digits than its factorization.

19473103911556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412838 (or 2206419 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 19473103911556 in words is "nineteen trillion, four hundred seventy-three billion, one hundred three million, nine hundred eleven thousand, five hundred fifty-six".