82133918 has 4 divisors (see below), whose sum is σ = 123200880. Its totient is φ = 41066958.

The previous prime is 82133879. The next prime is 82133921. The reversal of 82133918 is 81933128.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20533478 + ... + 20533481.

It is an arithmetic number, because the mean of its divisors is an integer number (30800220).

Almost surely, 2^82133918 is an apocalyptic number.

82133918 is a deficient number, since it is larger than the sum of its proper divisors (41066962).

82133918 is a wasteful number, since it uses less digits than its factorization.

82133918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41066961.

The product of its digits is 10368, while the sum is 35.

The square root of 82133918 is about 9062.7765061266. The cubic root of 82133918 is about 434.6845257455.

The spelling of 82133918 in words is "eighty-two million, one hundred thirty-three thousand, nine hundred eighteen".