19180980 has 144 divisors (see below), whose sum is σ = 71670144. Its totient is φ = 4043520.

The previous prime is 19180943. The next prime is 19180991. The reversal of 19180980 is 8908191.

It is a Smith number, since the sum of its digits (36) 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 (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15795 + ... + 16965.

Almost surely, 2^19180980 is an apocalyptic number.

19180980 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 19180980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35835072).

19180980 is an abundant number, since it is smaller than the sum of its proper divisors (52489164).

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

19180980 is a wasteful number, since it uses less digits than its factorization.

19180980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 19180980 is about 4379.6095716399. The cubic root of 19180980 is about 267.6847298840.

The spelling of 19180980 in words is "nineteen million, one hundred eighty thousand, nine hundred eighty".