18769540 has 24 divisors (see below), whose sum is σ = 39497472. Its totient is φ = 7492320.

The previous prime is 18769483. The next prime is 18769561. The reversal of 18769540 is 4596781.

It is a junction number, because it is equal to n+sod(n) for n = 18769493 and 18769502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18445 + ... + 19435.

It is an arithmetic number, because the mean of its divisors is an integer number (1645728).

Almost surely, 2^18769540 is an apocalyptic number.

18769540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18769540 is an abundant number, since it is smaller than the sum of its proper divisors (20727932).

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

18769540 is a wasteful number, since it uses less digits than its factorization.

18769540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 18769540 is about 4332.3827162429. The cubic root of 18769540 is about 265.7568962492.

The spelling of 18769540 in words is "eighteen million, seven hundred sixty-nine thousand, five hundred forty".