19472686481 has 4 divisors (see below), whose sum is σ = 19474966452. Its totient is φ = 19470406512.

The previous prime is 19472686469. The next prime is 19472686483. The reversal of 19472686481 is 18468627491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5026810000 + 14445876481 = 70900^2 + 120191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19472686481 is a prime.

It is a super-2 number, since 2×19472686481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19472686483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127126 + ... + 1144271.

It is an arithmetic number, because the mean of its divisors is an integer number (4868741613).

Almost surely, 2^19472686481 is an apocalyptic number.

It is an amenable number.

19472686481 is a deficient number, since it is larger than the sum of its proper divisors (2279971).

19472686481 is an equidigital number, since it uses as much as digits as its factorization.

19472686481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279970.

The product of its digits is 4644864, while the sum is 56.

The spelling of 19472686481 in words is "nineteen billion, four hundred seventy-two million, six hundred eighty-six thousand, four hundred eighty-one".