19381690850 has 24 divisors (see below), whose sum is σ = 36127183248. Its totient is φ = 7736066000.

The previous prime is 19381690849. The next prime is 19381690859. The reversal of 19381690850 is 5809618391.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (19381690859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391676 + ... + 438375.

It is an arithmetic number, because the mean of its divisors is an integer number (1505299302).

Almost surely, 2^19381690850 is an apocalyptic number.

19381690850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19381690850 is a deficient number, since it is larger than the sum of its proper divisors (16745492398).

19381690850 is a wasteful number, since it uses less digits than its factorization.

19381690850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830530 (or 830525 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 19381690850 in words is "nineteen billion, three hundred eighty-one million, six hundred ninety thousand, eight hundred fifty".