18281099690 has 16 divisors (see below), whose sum is σ = 37606833792. Its totient is φ = 6267805584.

The previous prime is 18281099671. The next prime is 18281099737. The reversal of 18281099690 is 9699018281.

It is a super-2 number, since 2×18281099690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130579214 + ... + 130579353.

It is an arithmetic number, because the mean of its divisors is an integer number (2350427112).

Almost surely, 2^18281099690 is an apocalyptic number.

18281099690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18281099690 is an abundant number, since it is smaller than the sum of its proper divisors (19325734102).

18281099690 is a wasteful number, since it uses less digits than its factorization.

18281099690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261158581.

The product of its (nonzero) digits is 559872, while the sum is 53.

The spelling of 18281099690 in words is "eighteen billion, two hundred eighty-one million, ninety-nine thousand, six hundred ninety".