19742805481 has 16 divisors (see below), whose sum is σ = 24118472448. Its totient is φ = 15791846400.

The previous prime is 19742805463. The next prime is 19742805487. The reversal of 19742805481 is 18450824791.

It is a cyclic number.

It is not a de Polignac number, because 19742805481 - 2⁷ = 19742805353 is a prime.

It is a super-2 number, since 2×19742805481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19742805487) 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, 1488840 + ... + 1502041.

It is an arithmetic number, because the mean of its divisors is an integer number (1507404528).

Almost surely, 2^19742805481 is an apocalyptic number.

It is an amenable number.

19742805481 is a deficient number, since it is larger than the sum of its proper divisors (4375666967).

19742805481 is a wasteful number, since it uses less digits than its factorization.

19742805481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990952.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 19742805481 in words is "nineteen billion, seven hundred forty-two million, eight hundred five thousand, four hundred eighty-one".