80021356 has 12 divisors (see below), whose sum is σ = 140149800. Its totient is φ = 39978560.

The previous prime is 80021317. The next prime is 80021377. The reversal of 80021356 is 65312008.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 80021356.

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, 1906 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (11679150).

Almost surely, 2^80021356 is an apocalyptic number.

It is an amenable number.

80021356 is a deficient number, since it is larger than the sum of its proper divisors (60128444).

80021356 is a wasteful number, since it uses less digits than its factorization.

80021356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16064 (or 16062 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 80021356 is about 8945.4656670293. The cubic root of 80021356 is about 430.9252763511.

The spelling of 80021356 in words is "eighty million, twenty-one thousand, three hundred fifty-six".