19090086858 has 32 divisors (see below), whose sum is σ = 42427528320. Its totient is φ = 6362595360.

The previous prime is 19090086857. The next prime is 19090086863. The reversal of 19090086858 is 85868009091.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (19090086857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593838 + ... + 625158.

It is an arithmetic number, because the mean of its divisors is an integer number (1325860260).

Almost surely, 2^19090086858 is an apocalyptic number.

19090086858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19090086858 is an abundant number, since it is smaller than the sum of its proper divisors (23337441462).

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

19090086858 is a wasteful number, since it uses less digits than its factorization.

19090086858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42619 (or 42613 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 19090086858 in words is "nineteen billion, ninety million, eighty-six thousand, eight hundred fifty-eight".