80021830 has 48 divisors (see below), whose sum is σ = 172164384. Its totient is φ = 26231040.

The previous prime is 80021803. The next prime is 80021831. The reversal of 80021830 is 3812008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80021831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35950 + ... + 38110.

It is an arithmetic number, because the mean of its divisors is an integer number (3586758).

Almost surely, 2^80021830 is an apocalyptic number.

80021830 is an abundant number, since it is smaller than the sum of its proper divisors (92142554).

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

80021830 is a wasteful number, since it uses less digits than its factorization.

80021830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 80021830 is about 8945.4921608596. The cubic root of 80021830 is about 430.9261271997.

Adding to 80021830 its reverse (3812008), we get a palindrome (83833838).

The spelling of 80021830 in words is "eighty million, twenty-one thousand, eight hundred thirty".