19790450793 has 10 divisors (see below), whose sum is σ = 29563513034. Its totient is φ = 13193633808.

The previous prime is 19790450791. The next prime is 19790450803. The reversal of 19790450793 is 39705409791.

It is a happy number.

19790450793 is a `hidden beast` number, since 19 + 7 + 90 + 450 + 7 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13748031504 + 6042419289 = 117252^2 + 77733^2 .

It is not a de Polignac number, because 19790450793 - 2¹ = 19790450791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19790450791) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 122163196 + ... + 122163357.

Almost surely, 2^19790450793 is an apocalyptic number.

It is an amenable number.

19790450793 is a deficient number, since it is larger than the sum of its proper divisors (9773062241).

19790450793 is an equidigital number, since it uses as much as digits as its factorization.

19790450793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244326565 (or 244326556 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 19790450793 in words is "nineteen billion, seven hundred ninety million, four hundred fifty thousand, seven hundred ninety-three".