19807663492 has 24 divisors (see below), whose sum is σ = 36829469880. Its totient is φ = 9321244160.

The previous prime is 19807663483. The next prime is 19807663493. The reversal of 19807663492 is 29436670891.

It can be written as a sum of positive squares in 4 ways, for example, as 9145861956 + 10661801536 = 95634^2 + 103256^2 .

It is not an unprimeable number, because it can be changed into a prime (19807663493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484309 + ... + 523612.

It is an arithmetic number, because the mean of its divisors is an integer number (1534561245).

Almost surely, 2^19807663492 is an apocalyptic number.

It is an amenable number.

19807663492 is a deficient number, since it is larger than the sum of its proper divisors (17021806388).

19807663492 is a wasteful number, since it uses less digits than its factorization.

19807663492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007976 (or 1007940 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 19807663492 in words is "nineteen billion, eight hundred seven million, six hundred sixty-three thousand, four hundred ninety-two".