19640614009 has 4 divisors (see below), whose sum is σ = 19653967360. Its totient is φ = 19627260660.

The previous prime is 19640614003. The next prime is 19640614027. The reversal of 19640614009 is 90041604691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90041604691 = 22303 ⋅4037197.

It is a cyclic number.

It is not a de Polignac number, because 19640614009 - 2³ = 19640614001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19640614001) 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, 6674469 + ... + 6677410.

It is an arithmetic number, because the mean of its divisors is an integer number (4913491840).

Almost surely, 2^19640614009 is an apocalyptic number.

It is an amenable number.

19640614009 is a deficient number, since it is larger than the sum of its proper divisors (13353351).

19640614009 is a wasteful number, since it uses less digits than its factorization.

19640614009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13353350.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 19640614009 in words is "nineteen billion, six hundred forty million, six hundred fourteen thousand, nine".