19378980 has 96 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 4861440.

The previous prime is 19378969. The next prime is 19378987. The reversal of 19378980 is 8987391.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19378987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8125 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^19378980 is an apocalyptic number.

19378980 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 19378980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

19378980 is an abundant number, since it is smaller than the sum of its proper divisors (44487900).

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

19378980 is a wasteful number, since it uses less digits than its factorization.

19378980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 19378980 is about 4402.1562898198. The cubic root of 19378980 is about 268.6026572904.

The spelling of 19378980 in words is "nineteen million, three hundred seventy-eight thousand, nine hundred eighty".