19603806461 has 8 divisors (see below), whose sum is σ = 20112357048. Its totient is φ = 19096704000.

The previous prime is 19603806451. The next prime is 19603806517. The reversal of 19603806461 is 16460830691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5125700836 + 14478105625 = 71594^2 + 120325^2 .

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 19603806461 - 2²² = 19599612157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19603806451) 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, 334580 + ... + 388781.

It is an arithmetic number, because the mean of its divisors is an integer number (2514044631).

Almost surely, 2^19603806461 is an apocalyptic number.

It is an amenable number.

19603806461 is a deficient number, since it is larger than the sum of its proper divisors (508550587).

19603806461 is an equidigital number, since it uses as much as digits as its factorization.

19603806461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724063.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 19603806461 in words is "nineteen billion, six hundred three million, eight hundred six thousand, four hundred sixty-one".