18926689650 has 384 divisors, whose sum is σ = 55539302400. Its totient is φ = 4219987200.

The previous prime is 18926689631. The next prime is 18926689651. The reversal of 18926689650 is 5698662981.

It is a super-2 number, since 2×18926689650² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18926689651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 176884897 + ... + 176885003.

It is an arithmetic number, because the mean of its divisors is an integer number (144633600).

Almost surely, 2^18926689650 is an apocalyptic number.

18926689650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18926689650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27769651200).

18926689650 is an abundant number, since it is smaller than the sum of its proper divisors (36612612750).

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

18926689650 is a wasteful number, since it uses less digits than its factorization.

18926689650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 18926689650 in words is "eighteen billion, nine hundred twenty-six million, six hundred eighty-nine thousand, six hundred fifty".