19431235086 has 16 divisors (see below), whose sum is σ = 38864703744. Its totient is φ = 6476706104.

The previous prime is 19431235063. The next prime is 19431235097. The reversal of 19431235086 is 68053213491.

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, 33211 + ... + 199913.

It is an arithmetic number, because the mean of its divisors is an integer number (2429043984).

Almost surely, 2^19431235086 is an apocalyptic number.

19431235086 is an abundant number, since it is smaller than the sum of its proper divisors (19433468658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19431235086 is a wasteful number, since it uses less digits than its factorization.

19431235086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186135.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 19431235086 in words is "nineteen billion, four hundred thirty-one million, two hundred thirty-five thousand, eighty-six".