19689000806 has 16 divisors (see below), whose sum is σ = 31278566016. Its totient is φ = 9263101056.

The previous prime is 19689000787. The next prime is 19689000811. The reversal of 19689000806 is 60800098691.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70160 + ... + 210476.

It is an arithmetic number, because the mean of its divisors is an integer number (1954910376).

Almost surely, 2^19689000806 is an apocalyptic number.

It is a pronic number, being equal to 140317×140318.

19689000806 is a deficient number, since it is larger than the sum of its proper divisors (11589565210).

19689000806 is a wasteful number, since it uses less digits than its factorization.

19689000806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144463.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 19689000806 in words is "nineteen billion, six hundred eighty-nine million, eight hundred six", and thus it is an aban number.