19627452961 has 4 divisors (see below), whose sum is σ = 19634842692. Its totient is φ = 19620063232.

The previous prime is 19627452959. The next prime is 19627452973. The reversal of 19627452961 is 16925472691.

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 13720608225 + 5906844736 = 117135^2 + 76856^2 .

It is a cyclic number.

It is not a de Polignac number, because 19627452961 - 2¹ = 19627452959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19627452899 and 19627452908.

It is not an unprimeable number, because it can be changed into a prime (19627422961) 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, 3690880 + ... + 3696193.

It is an arithmetic number, because the mean of its divisors is an integer number (4908710673).

Almost surely, 2^19627452961 is an apocalyptic number.

It is an amenable number.

19627452961 is a deficient number, since it is larger than the sum of its proper divisors (7389731).

19627452961 is an equidigital number, since it uses as much as digits as its factorization.

19627452961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389730.

The product of its digits is 1632960, while the sum is 52.

The spelling of 19627452961 in words is "nineteen billion, six hundred twenty-seven million, four hundred fifty-two thousand, nine hundred sixty-one".