80080021 has 4 divisors (see below), whose sum is σ = 91520032. Its totient is φ = 68640012.

The previous prime is 80080001. The next prime is 80080027. The reversal of 80080021 is 12008008.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80080021 - 2¹⁷ = 79948949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80080027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5719995 + ... + 5720008.

It is an arithmetic number, because the mean of its divisors is an integer number (22880008).

Almost surely, 2^80080021 is an apocalyptic number.

It is an amenable number.

80080021 is a deficient number, since it is larger than the sum of its proper divisors (11440011).

80080021 is a wasteful number, since it uses less digits than its factorization.

80080021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440010.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 80080021 is about 8948.7441018279. The cubic root of 80080021 is about 431.0305568135.

Adding to 80080021 its reverse (12008008), we get a palindrome (92088029).

The spelling of 80080021 in words is "eighty million, eighty thousand, twenty-one".