19749704806 has 8 divisors (see below), whose sum is σ = 31903369344. Its totient is φ = 9115248360.

The previous prime is 19749704803. The next prime is 19749704851. The reversal of 19749704806 is 60840794791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19749704803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379801990 + ... + 379802041.

It is an arithmetic number, because the mean of its divisors is an integer number (3987921168).

Almost surely, 2^19749704806 is an apocalyptic number.

19749704806 is a deficient number, since it is larger than the sum of its proper divisors (12153664538).

19749704806 is a wasteful number, since it uses less digits than its factorization.

19749704806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759604046.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 19749704806 in words is "nineteen billion, seven hundred forty-nine million, seven hundred four thousand, eight hundred six".