19390590992 has 20 divisors (see below), whose sum is σ = 37575628860. Its totient is φ = 9693654528.

The previous prime is 19390590959. The next prime is 19390591007. The reversal of 19390590992 is 29909509391.

It can be written as a sum of positive squares in 2 ways, for example, as 5037592576 + 14352998416 = 70976^2 + 119804^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093 + ... + 196940.

It is an arithmetic number, because the mean of its divisors is an integer number (1878781443).

Almost surely, 2^19390590992 is an apocalyptic number.

It is an amenable number.

19390590992 is a deficient number, since it is larger than the sum of its proper divisors (18185037868).

19390590992 is a wasteful number, since it uses less digits than its factorization.

19390590992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205130 (or 205124 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 56.

The spelling of 19390590992 in words is "nineteen billion, three hundred ninety million, five hundred ninety thousand, nine hundred ninety-two".