81818102903 has 16 divisors (see below), whose sum is σ = 83288023200. Its totient is φ = 80361262080.

The previous prime is 81818102893. The next prime is 81818102953. The reversal of 81818102903 is 30920181818.

It is a cyclic number.

It is not a de Polignac number, because 81818102903 - 2⁴ = 81818102887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81818102953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33271688 + ... + 33274146.

It is an arithmetic number, because the mean of its divisors is an integer number (5205501450).

Almost surely, 2^81818102903 is an apocalyptic number.

81818102903 is a deficient number, since it is larger than the sum of its proper divisors (1469920297).

81818102903 is a wasteful number, since it uses less digits than its factorization.

81818102903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882.

The product of its (nonzero) digits is 27648, while the sum is 41.

The spelling of 81818102903 in words is "eighty-one billion, eight hundred eighteen million, one hundred two thousand, nine hundred three".