80021180 has 12 divisors (see below), whose sum is σ = 168044520. Its totient is φ = 32008464.

The previous prime is 80021171. The next prime is 80021239. The reversal of 80021180 is 8112008.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 4001059 = 80021180 / (8 + 0 + 0 + 2 + 1 + 1 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000510 + ... + 2000549.

It is an arithmetic number, because the mean of its divisors is an integer number (14003710).

Almost surely, 2^80021180 is an apocalyptic number.

It is an amenable number.

80021180 is an abundant number, since it is smaller than the sum of its proper divisors (88023340).

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

80021180 is a wasteful number, since it uses less digits than its factorization.

80021180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001068 (or 4001066 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 80021180 is about 8945.4558296377. The cubic root of 80021180 is about 430.9249604234.

Adding to 80021180 its reverse (8112008), we get a palindrome (88133188).

The spelling of 80021180 in words is "eighty million, twenty-one thousand, one hundred eighty".