19102257920 has 72 divisors (see below), whose sum is σ = 45785068560. Its totient is φ = 7636029440.

The previous prime is 19102257913. The next prime is 19102257929. The reversal of 19102257920 is 2975220191.

It is not an unprimeable number, because it can be changed into a prime (19102257929) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2529350 + ... + 2536890.

It is an arithmetic number, because the mean of its divisors is an integer number (635903730).

Almost surely, 2^19102257920 is an apocalyptic number.

19102257920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19102257920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22892534280).

19102257920 is an abundant number, since it is smaller than the sum of its proper divisors (26682810640).

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

19102257920 is an equidigital number, since it uses as much as digits as its factorization.

19102257920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541 (or 9527 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 19102257920 in words is "nineteen billion, one hundred two million, two hundred fifty-seven thousand, nine hundred twenty".