19304601481 has 27 divisors (see below), whose sum is σ = 22571090983. Its totient is φ = 16495075520.

The previous prime is 19304601473. The next prime is 19304601487. The reversal of 19304601481 is 18410640391.

The square root of 19304601481 is 138941.

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., 15029534025 + 4275067456 = 122595^2 + 65384^2 .

It is not a de Polignac number, because 19304601481 - 2³ = 19304601473 is a prime.

It is a super-2 number, since 2×19304601481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19304601481.

It is not an unprimeable number, because it can be changed into a prime (19304601487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25981596 + ... + 25982338.

Almost surely, 2^19304601481 is an apocalyptic number.

19304601481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19304601481 is the 138941-st square number.

19304601481 is the 69471-st centered octagonal number.

It is an amenable number.

19304601481 is a deficient number, since it is larger than the sum of its proper divisors (3266489502).

19304601481 is an frugal number, since it uses more digits than its factorization.

19304601481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

Multiplying 19304601481 by its product of nonzero digits (20736), we get a square (400300216310016 = 20007504²).

The spelling of 19304601481 in words is "nineteen billion, three hundred four million, six hundred one thousand, four hundred eighty-one".