19734220785 has 8 divisors (see below), whose sum is σ = 31574753280. Its totient is φ = 10524917744.

The previous prime is 19734220769. The next prime is 19734220811. The reversal of 19734220785 is 58702243791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19734220785 - 2⁴ = 19734220769 is a prime.

It is a super-2 number, since 2×19734220785² (a number of 21 digits) contains 22 as substring.

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, 657807345 + ... + 657807374.

It is an arithmetic number, because the mean of its divisors is an integer number (3946844160).

Almost surely, 2^19734220785 is an apocalyptic number.

19734220785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19734220785 is a deficient number, since it is larger than the sum of its proper divisors (11840532495).

19734220785 is a wasteful number, since it uses less digits than its factorization.

19734220785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315614727.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 19734220785 in words is "nineteen billion, seven hundred thirty-four million, two hundred twenty thousand, seven hundred eighty-five".