19868203790 has 48 divisors (see below), whose sum is σ = 38021709312. Its totient is φ = 7473593856.

The previous prime is 19868203783. The next prime is 19868203853. The reversal of 19868203790 is 9730286891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5006387 + ... + 5010353.

It is an arithmetic number, because the mean of its divisors is an integer number (792118944).

Almost surely, 2^19868203790 is an apocalyptic number.

19868203790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19868203790 is a deficient number, since it is larger than the sum of its proper divisors (18153505522).

19868203790 is a wasteful number, since it uses less digits than its factorization.

19868203790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741 (or 5724 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 19868203790 in words is "nineteen billion, eight hundred sixty-eight million, two hundred three thousand, seven hundred ninety".