18739650 has 48 divisors (see below), whose sum is σ = 46747008. Its totient is φ = 4968000.

The previous prime is 18739619. The next prime is 18739663. The reversal of 18739650 is 5693781.

It is a junction number, because it is equal to n+sod(n) for n = 18739599 and 18739608.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 40420 + ... + 40880.

It is an arithmetic number, because the mean of its divisors is an integer number (973896).

Almost surely, 2^18739650 is an apocalyptic number.

18739650 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 18739650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23373504).

18739650 is an abundant number, since it is smaller than the sum of its proper divisors (28007358).

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

18739650 is a wasteful number, since it uses less digits than its factorization.

18739650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18739650 is about 4328.9317388936. The cubic root of 18739650 is about 265.6157510044.

The spelling of 18739650 in words is "eighteen million, seven hundred thirty-nine thousand, six hundred fifty".