19806098061 has 4 divisors (see below), whose sum is σ = 26408130752. Its totient is φ = 13204065372.

The previous prime is 19806098057. The next prime is 19806098099. The reversal of 19806098061 is 16089060891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16089060891 = 3 ⋅5363020297.

It is not a de Polignac number, because 19806098061 - 2² = 19806098057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19806098061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806098041) 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, 3301016341 + ... + 3301016346.

It is an arithmetic number, because the mean of its divisors is an integer number (6602032688).

Almost surely, 2^19806098061 is an apocalyptic number.

It is an amenable number.

19806098061 is a deficient number, since it is larger than the sum of its proper divisors (6602032691).

19806098061 is an equidigital number, since it uses as much as digits as its factorization.

19806098061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602032690.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 19806098061 in words is "nineteen billion, eight hundred six million, ninety-eight thousand, sixty-one".