80021308436 has 24 divisors (see below), whose sum is σ = 141883081704. Its totient is φ = 39486325760.

The previous prime is 80021308403. The next prime is 80021308439. The reversal of 80021308436 is 63480312008.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 218448400 + 79802860036 = 14780^2 + 282494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80021308396 and 80021308405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80021308439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274595 + ... + 485226.

It is an arithmetic number, because the mean of its divisors is an integer number (5911795071).

Almost surely, 2^80021308436 is an apocalyptic number.

It is an amenable number.

80021308436 is a deficient number, since it is larger than the sum of its proper divisors (61861773268).

80021308436 is a wasteful number, since it uses less digits than its factorization.

80021308436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760171 (or 760169 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 80021308436 in words is "eighty billion, twenty-one million, three hundred eight thousand, four hundred thirty-six".