18863370890 has 64 divisors (see below), whose sum is σ = 41830871040. Its totient is φ = 5964053760.

The previous prime is 18863370847. The next prime is 18863370923. The reversal of 18863370890 is 9807336881.

It is a super-2 number, since 2×18863370890² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 963095 + ... + 982485.

It is an arithmetic number, because the mean of its divisors is an integer number (653607360).

Almost surely, 2^18863370890 is an apocalyptic number.

18863370890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18863370890 is an abundant number, since it is smaller than the sum of its proper divisors (22967500150).

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

18863370890 is a wasteful number, since it uses less digits than its factorization.

18863370890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20487.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 18863370890 in words is "eighteen billion, eight hundred sixty-three million, three hundred seventy thousand, eight hundred ninety".