19745600109 has 8 divisors (see below), whose sum is σ = 27713123040. Its totient is φ = 12470905296.

The previous prime is 19745600101. The next prime is 19745600117. The reversal of 19745600109 is 90100654791.

It is an interprime number because it is at equal distance from previous prime (19745600101) and next prime (19745600117).

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

It is not a de Polignac number, because 19745600109 - 2³ = 19745600101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19745600101) 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, 173206962 + ... + 173207075.

It is an arithmetic number, because the mean of its divisors is an integer number (3464140380).

Almost surely, 2^19745600109 is an apocalyptic number.

19745600109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19745600109 is a deficient number, since it is larger than the sum of its proper divisors (7967522931).

19745600109 is a wasteful number, since it uses less digits than its factorization.

19745600109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346414059.

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 19745600109 in words is "nineteen billion, seven hundred forty-five million, six hundred thousand, one hundred nine".