19428198761 has 8 divisors (see below), whose sum is σ = 20110402560. Its totient is φ = 18754264368.

The previous prime is 19428198707. The next prime is 19428198809. The reversal of 19428198761 is 16789182491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19428198761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19428198697 and 19428198706.

It is not an unprimeable number, because it can be changed into a prime (19428198701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062571 + ... + 2071968.

It is an arithmetic number, because the mean of its divisors is an integer number (2513800320).

Almost surely, 2^19428198761 is an apocalyptic number.

It is an amenable number.

19428198761 is a deficient number, since it is larger than the sum of its proper divisors (682203799).

19428198761 is a wasteful number, since it uses less digits than its factorization.

19428198761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134703.

The product of its digits is 1741824, while the sum is 56.

The spelling of 19428198761 in words is "nineteen billion, four hundred twenty-eight million, one hundred ninety-eight thousand, seven hundred sixty-one".