19045205850 has 48 divisors (see below), whose sum is σ = 51525943200. Its totient is φ = 4617019200.

The previous prime is 19045205843. The next prime is 19045205857. The reversal of 19045205850 is 5850254091.

It is an interprime number because it is at equal distance from previous prime (19045205843) and next prime (19045205857).

It is a junction number, because it is equal to n+sod(n) for n = 19045205799 and 19045205808.

It is not an unprimeable number, because it can be changed into a prime (19045205857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5769625 + ... + 5772924.

It is an arithmetic number, because the mean of its divisors is an integer number (1073457150).

Almost surely, 2^19045205850 is an apocalyptic number.

19045205850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19045205850 is an abundant number, since it is smaller than the sum of its proper divisors (32480737350).

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

19045205850 is a wasteful number, since it uses less digits than its factorization.

19045205850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11542575 (or 11542570 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 19045205850 in words is "nineteen billion, forty-five million, two hundred five thousand, eight hundred fifty".