18220805610 has 32 divisors (see below), whose sum is σ = 49977067392. Its totient is φ = 4164755520.

The previous prime is 18220805609. The next prime is 18220805627. The reversal of 18220805610 is 1650802281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43382661 + ... + 43383080.

It is an arithmetic number, because the mean of its divisors is an integer number (1561783356).

Almost surely, 2^18220805610 is an apocalyptic number.

18220805610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18220805610 is an abundant number, since it is smaller than the sum of its proper divisors (31756261782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18220805610 is a wasteful number, since it uses less digits than its factorization.

18220805610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86765758.

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 18220805610 in words is "eighteen billion, two hundred twenty million, eight hundred five thousand, six hundred ten".