81826803 has 24 divisors (see below), whose sum is σ = 121286880. Its totient is φ = 53141760.

The previous prime is 81826799. The next prime is 81826837. The reversal of 81826803 is 30862818.

It is not a de Polignac number, because 81826803 - 2² = 81826799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81825803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61378 + ... + 62696.

It is an arithmetic number, because the mean of its divisors is an integer number (5053620).

Almost surely, 2^81826803 is an apocalyptic number.

81826803 is a deficient number, since it is larger than the sum of its proper divisors (39460077).

81826803 is a wasteful number, since it uses less digits than its factorization.

81826803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 81826803 is about 9045.8168785356. The cubic root of 81826803 is about 434.1420585168.

The spelling of 81826803 in words is "eighty-one million, eight hundred twenty-six thousand, eight hundred three".