19795980 has 96 divisors (see below), whose sum is σ = 59351040. Its totient is φ = 4919040.

The previous prime is 19795969. The next prime is 19795987. The reversal of 19795980 is 8959791.

It is not an unprimeable number, because it can be changed into a prime (19795987) 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, 53757 + ... + 54123.

It is an arithmetic number, because the mean of its divisors is an integer number (618240).

Almost surely, 2^19795980 is an apocalyptic number.

19795980 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 19795980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29675520).

19795980 is an abundant number, since it is smaller than the sum of its proper divisors (39555060).

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

19795980 is a wasteful number, since it uses less digits than its factorization.

19795980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 19795980 is about 4449.2673554193. The cubic root of 19795980 is about 270.5156127989.

The spelling of 19795980 in words is "nineteen million, seven hundred ninety-five thousand, nine hundred eighty".