19431235085 has 8 divisors (see below), whose sum is σ = 24069659136. Its totient is φ = 15043536720.

The previous prime is 19431235063. The next prime is 19431235097. The reversal of 19431235085 is 58053213491.

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

It is not a de Polignac number, because 19431235085 - 2¹² = 19431230989 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 62681249 + ... + 62681558.

It is an arithmetic number, because the mean of its divisors is an integer number (3008707392).

Almost surely, 2^19431235085 is an apocalyptic number.

It is an amenable number.

19431235085 is a deficient number, since it is larger than the sum of its proper divisors (4638424051).

19431235085 is a wasteful number, since it uses less digits than its factorization.

19431235085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125362843.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 19431235085 in words is "nineteen billion, four hundred thirty-one million, two hundred thirty-five thousand, eighty-five".