80447018 has 4 divisors (see below), whose sum is σ = 120670530. Its totient is φ = 40223508.

The previous prime is 80446999. The next prime is 80447021. The reversal of 80447018 is 81074408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70442449 + 10004569 = 8393^2 + 3163^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20111753 + ... + 20111756.

Almost surely, 2^80447018 is an apocalyptic number.

80447018 is a deficient number, since it is larger than the sum of its proper divisors (40223512).

80447018 is a wasteful number, since it uses less digits than its factorization.

80447018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40223511.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 80447018 is about 8969.2261650602. The cubic root of 80447018 is about 431.6880070413.

The spelling of 80447018 in words is "eighty million, four hundred forty-seven thousand, eighteen".