19893065495 has 4 divisors (see below), whose sum is σ = 23871678600. Its totient is φ = 15914452392.

The previous prime is 19893065483. The next prime is 19893065501. The reversal of 19893065495 is 59456039891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59456039891 = 2879 ⋅20651629.

It is a cyclic number.

It is not a de Polignac number, because 19893065495 - 2⁶ = 19893065431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989306545 + ... + 1989306554.

It is an arithmetic number, because the mean of its divisors is an integer number (5967919650).

Almost surely, 2^19893065495 is an apocalyptic number.

19893065495 is a deficient number, since it is larger than the sum of its proper divisors (3978613105).

19893065495 is an equidigital number, since it uses as much as digits as its factorization.

19893065495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978613104.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 19893065495 in words is "nineteen billion, eight hundred ninety-three million, sixty-five thousand, four hundred ninety-five".