18738286890 has 32 divisors (see below), whose sum is σ = 47617295040. Its totient is φ = 4702942464.

The previous prime is 18738286849. The next prime is 18738286909. The reversal of 18738286890 is 9868283781.

It is a super-2 number, since 2×18738286890² (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 15 ways as a sum of consecutive naturals, for example, 18370360 + ... + 18371379.

It is an arithmetic number, because the mean of its divisors is an integer number (1488040470).

Almost surely, 2^18738286890 is an apocalyptic number.

18738286890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18738286890 is an abundant number, since it is smaller than the sum of its proper divisors (28879008150).

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

18738286890 is a wasteful number, since it uses less digits than its factorization.

18738286890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36741766.

The product of its (nonzero) digits is 9289728, while the sum is 60.

The spelling of 18738286890 in words is "eighteen billion, seven hundred thirty-eight million, two hundred eighty-six thousand, eight hundred ninety".