19790440363 has 4 divisors (see below), whose sum is σ = 19791398488. Its totient is φ = 19789482240.

The previous prime is 19790440349. The next prime is 19790440381. The reversal of 19790440363 is 36304409791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36304409791 = 13 ⋅2792646907.

It is a cyclic number.

It is not a de Polignac number, because 19790440363 - 2¹⁷ = 19790309291 is a prime.

It is a super-2 number, since 2×19790440363² (a number of 21 digits) contains 22 as substring.

It is the 140679-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19790446363) by changing a digit.

It is a nontrivial repunit in base 140678.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447381 + ... + 489622.

It is an arithmetic number, because the mean of its divisors is an integer number (4947849622).

Almost surely, 2^19790440363 is an apocalyptic number.

19790440363 is a deficient number, since it is larger than the sum of its proper divisors (958125).

19790440363 is an equidigital number, since it uses as much as digits as its factorization.

19790440363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958124.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 19790440363 in words is "nineteen billion, seven hundred ninety million, four hundred forty thousand, three hundred sixty-three".