19801050 has 48 divisors (see below), whose sum is σ = 49630752. Its totient is φ = 5224000.

The previous prime is 19801037. The next prime is 19801051. The reversal of 19801050 is 5010891.

It is a super-2 number, since 2×19801050² = 784163162205000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19801050.

It is not an unprimeable number, because it can be changed into a prime (19801051) 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 23 ways as a sum of consecutive naturals, for example, 14497 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (1033974).

Almost surely, 2^19801050 is an apocalyptic number.

19801050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19801050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24815376).

19801050 is an abundant number, since it is smaller than the sum of its proper divisors (29829702).

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

19801050 is a wasteful number, since it uses less digits than its factorization.

19801050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 19801050 is about 4449.8370756692. The cubic root of 19801050 is about 270.5387049803.

The spelling of 19801050 in words is "nineteen million, eight hundred one thousand, fifty".