19460618641 has 8 divisors (see below), whose sum is σ = 20887627464. Its totient is φ = 18064972800.

The previous prime is 19460618603. The next prime is 19460618647. The reversal of 19460618641 is 14681606491.

It can be written as a sum of positive squares in 4 ways, for example, as 4747899025 + 14712719616 = 68905^2 + 121296^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19460618641 - 2¹⁵ = 19460585873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19460618591 and 19460618600.

It is not an unprimeable number, because it can be changed into a prime (19460618647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7839460 + ... + 7841941.

It is an arithmetic number, because the mean of its divisors is an integer number (2610953433).

Almost surely, 2^19460618641 is an apocalyptic number.

It is an amenable number.

19460618641 is a deficient number, since it is larger than the sum of its proper divisors (1427008823).

19460618641 is a wasteful number, since it uses less digits than its factorization.

19460618641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15681491.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 19460618641 in words is "nineteen billion, four hundred sixty million, six hundred eighteen thousand, six hundred forty-one".