19890613005 has 32 divisors (see below), whose sum is σ = 32530118400. Its totient is φ = 10374574080.

The previous prime is 19890612977. The next prime is 19890613013. The reversal of 19890613005 is 50031609891.

It is not a de Polignac number, because 19890613005 - 2¹⁰ = 19890611981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207021 + ... + 287469.

It is an arithmetic number, because the mean of its divisors is an integer number (1016566200).

Almost surely, 2^19890613005 is an apocalyptic number.

19890613005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19890613005 is a deficient number, since it is larger than the sum of its proper divisors (12639505395).

19890613005 is a wasteful number, since it uses less digits than its factorization.

19890613005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80821.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 19890613005 in words is "nineteen billion, eight hundred ninety million, six hundred thirteen thousand, five".