19165089820 has 12 divisors (see below), whose sum is σ = 40246688664. Its totient is φ = 7666035920.

The previous prime is 19165089773. The next prime is 19165089869. The reversal of 19165089820 is 2898056191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479127226 + ... + 479127265.

It is an arithmetic number, because the mean of its divisors is an integer number (3353890722).

Almost surely, 2^19165089820 is an apocalyptic number.

19165089820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19165089820 is an abundant number, since it is smaller than the sum of its proper divisors (21081598844).

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

19165089820 is a wasteful number, since it uses less digits than its factorization.

19165089820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958254500 (or 958254498 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 19165089820 in words is "nineteen billion, one hundred sixty-five million, eighty-nine thousand, eight hundred twenty".