81854732 has 6 divisors (see below), whose sum is σ = 143245788. Its totient is φ = 40927364.

The previous prime is 81854713. The next prime is 81854761. The reversal of 81854732 is 23745818.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10231838 + ... + 10231845.

It is an arithmetic number, because the mean of its divisors is an integer number (23874298).

Almost surely, 2^81854732 is an apocalyptic number.

It is an amenable number.

81854732 is a deficient number, since it is larger than the sum of its proper divisors (61391056).

81854732 is a wasteful number, since it uses less digits than its factorization.

81854732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20463687 (or 20463685 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 81854732 is about 9047.3604990627. The cubic root of 81854732 is about 434.1914464673.

The spelling of 81854732 in words is "eighty-one million, eight hundred fifty-four thousand, seven hundred thirty-two".