19380850 has 36 divisors (see below), whose sum is σ = 38423322. Its totient is φ = 7248000.

The previous prime is 19380847. The next prime is 19380857. The reversal of 19380850 is 5808391.

It can be written as a sum of positive squares in 3 ways, for example, as 16621929 + 2758921 = 4077^2 + 1661^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19380857) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 128275 + ... + 128425.

Almost surely, 2^19380850 is an apocalyptic number.

19380850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19380850 is a deficient number, since it is larger than the sum of its proper divisors (19042472).

19380850 is a wasteful number, since it uses less digits than its factorization.

19380850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 19380850 is about 4402.3686806082. The cubic root of 19380850 is about 268.6112967340.

Multiplying 19380850 by its sum of digits (34), we get a square (658948900 = 25670²).

19380850 divided by its sum of digits (34) gives a square (570025 = 755²).

The spelling of 19380850 in words is "nineteen million, three hundred eighty thousand, eight hundred fifty".